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Sump, Sewage, & Effluent Pumps
Availability
Type
Voltage
GPM
Price
$0
$2,736.41
5030CVSP DuraMAC Sump Pump 3/10 HP 120V Cast Iron
A.Y. McDonald
5030CVSP DuraMAC Sump Pump 3/10 HP 120V Cast Iron
- Price
- From $289.76
5050CUSJ DuraMAC Sewage Pump 1/2 HP 120V Cast Iron
A.Y. McDonald
5050CUSJ DuraMAC Sewage Pump 1/2 HP 120V Cast Iron
- Price
- From $511.85
5050CVSP DuraMAC Sump Pump 1/2 HP 120V Cast Iron
A.Y. McDonald
5050CVSP DuraMAC Sump Pump 1/2 HP 120V Cast Iron
- Price
- From $399.26
5033CVSP DuraMAC Sump Pump 1/3 HP 120V Cast Iron
A.Y. McDonald
5033CVSP DuraMAC Sump Pump 1/3 HP 120V Cast Iron
- Price
- From $334.67
1 & 2 HP Grinder Pumps Cast Iron
A.Y. McDonald
1 & 2 HP Grinder Pumps Cast Iron
- Price
- From $2,135.97
4/10 - 1/2 HP Effluent Submersible Pumps
A.Y. McDonald
4/10 - 1/2 HP Effluent Submersible Pumps
- Price
- From $626.89
Thermoplastic High Head Effluent Pump 30 GPM w/o Check Valve
A.Y. McDonald
Thermoplastic High Head Effluent Pump 30 GPM w/o Check Valve
- Price
- From $1,275.31
Thermoplastic High Head Effluent Pump 30 GPM
A.Y. McDonald
Thermoplastic High Head Effluent Pump 30 GPM
- Price
- From $1,275.31
Thermoplastic High Head Effluent Pump 20 GPM w/o Check Valve
A.Y. McDonald
Thermoplastic High Head Effluent Pump 20 GPM w/o Check Valve
- Price
- From $1,237.17
Thermoplastic High Head Effluent Pump 20 GPM
A.Y. McDonald
Thermoplastic High Head Effluent Pump 20 GPM
- Price
- From $1,237.17
Thermoplastic High Head Effluent Pump 10 GPM w/o Check Valve
A.Y. McDonald
Thermoplastic High Head Effluent Pump 10 GPM w/o Check Valve
- Price
- From $1,222.40
Sump, Sewage, & Effluent Pumps
Description
Authorized Baker · Goulds · Liberty Quote · Authorized Xylem Dealer
Sump · Sewage · Effluent
Grinder · Utility
Pumps
The complete Baker DuraMAC submersible and utility pump lineup — sump, sewage, effluent, grinder, and portable utility pumps in one unified family. Plus Xylem (Goulds, Flygt, Liberty) commercial and engineered pressure sewer systems available by quote. Same-day shipping from Houston on every stocked configuration.
5 Categories
One Catalog Family
⅕ – 2 HP
Power Range
¼"–3"
Solids Handling
Same Day
Houston Stock
Brands We Carry
Wastewater & Utility Pumps from Trusted Manufacturers
Baker DuraMAC is our flagship submersible pump line — full coverage of sump, sewage, effluent, grinder, and utility applications under one model number system. Xylem (Goulds Water Technology, Flygt) and Liberty Pumps available by quote for commercial, industrial, and engineered pressure sewer systems.
Critical First Question
Pick the Right Pump Type
Five different pumps for five different liquids. Get this right first — confusing the categories is the #1 source of premature failure on residential installations.
Most Common
Sump Pump
Clean water — groundwater, rainwater, basement seepage, foundation drainage. Solids handling ⅛"–½", discharge 1¼"–1½".
Below-Grade
Sewage Pump
Raw blackwater with toilet waste. 2" solids handling minimum, 2" discharge required by code. Below-grade bathrooms.
Septic / Greywater
Effluent Pump
Pre-treated water — post-septic-tank effluent, greywater, dewatering. ¾" solids handling. NOT for raw sewage.
Pressure Sewer
Grinder Pump
Cuts solids before pumping — 24,000 cuts/sec, 3" cut. For pressure sewer, long discharge runs, high TDH.
Portable
Utility Pump
Portable transfer for water removal — pool drain, basement flood, garden hose discharge. Not for permanent install.
⚠ The Most Expensive Mistake: Wrong Pump Type
Use a sump pump where a sewage pump is required → clogs in hours, basement bathroom out of service. Use an effluent pump for raw sewage → impeller jams, motor burns out. Use a sewage pump for pressure sewer → can't develop the head, water backs up. The model number decoder below disambiguates every Baker pump in seconds.
Read Any Baker Wastewater Model Number
DuraMAC Model Number Decoder
Every Baker submersible pump uses one consistent naming pattern. Read the model number left-to-right and you know exactly what you're holding.
Example: 5 033 C T EF 25
Position-by-Position Decoder
5
Series
5 = DuraMAC submersible. Anchors all sump/sewage/effluent/utility models.
033
Horsepower Code
020 = ⅕ HP · 025 = ¼ HP · 030 = 3/10 HP · 033 = ⅓ HP · 040 = 4/10 HP · 050 = ½ HP
C / P
Construction
C = Cast Iron (continuous duty, mineralized water, sewage) · P = Plastic / Thermoplastic (budget, corrosion-resistant)
T / V / U
Switch Type
T = Tethered (wider basins, fewer cycles) · V = Vertical (tight basins) · U = None / Utility (external controls, alarm panels)
Pump Type & Specials
UP
Utility Pump (portable transfer)
5020PUUP — 1/5 HP, 26 GPM, garden hose adapter, fits in 6" opening
SP
Sump Pump (groundwater)
5025PTSP, 5030CVSP, 5050CVSP — clean water removal
EF
Effluent Pump (post-septic)
5033CTEF25, 5050CTEF — pre-treated water, ¾" solids
SJ
Sewage eJector (raw blackwater)
5050CTSJ, 5050CVSJ — 2" solids, code-compliant 2" discharge
PD
Pedestal Pump
5033PVPD, 5050CVPD — non-submersible, motor above water
15 / 25
Cord Length Specials
15 = 15' cord · 25 = 25' cord (default is 10')
EZ / K / H
Configuration Specials
EZ = EZ install · K = Kit/sink system · H = High head / high volume
BU / CWB / CSK
Specialty Packages
BU = Battery backup · CWB = Clearwater basin · CSK = Crawl space kit · PAC = Simplex package
Reading 5050CTSJH25 in 3 Seconds
5 = DuraMAC series · 050 = ½ HP · C = Cast iron · T = Tethered float · SJ = Sewage ejector · H = High head/volume · 25 = 25' cord. Translation: ½ HP cast iron sewage pump with tethered float, high-head impeller, 25' cord. Perfect for premium below-grade bathroom installs with long discharge runs.
Best Seller · Basement & Crawl Space
Sump Pumps — Baker DuraMAC SP Series
Protect your basement, crawl space, and property from groundwater. Thermoplastic for budget residential, cast iron for continuous duty and high water tables, plus pre-built packages, battery backup, and crawl space kits for drop-in installation.
Sump Pump Lineup
| Model | HP | Body | Switch | Max Flow | Best For |
|---|---|---|---|---|---|
| 5025PTSP | ¼ HP | Thermoplastic | Tethered | 30 GPM | Standard residential, budget |
| 5025PVSP | ¼ HP | Thermoplastic | Vertical | 30 GPM | Tight basin, narrow pit |
| 5030CVSP / CTSP | 3/10 HP | Cast Iron | Vertical / Tethered | 50 GPM | Mid-tier residential |
| 5030CUSP / CUSP25 | 3/10 HP | Cast Iron | None (utility) | 50 GPM | External controls, duplex setups |
| 5033CVSP / CVSPEZ | ⅓ HP | Cast Iron | Vertical | 55 GPM | Most popular — sweet spot for residential |
| 5050CVSP / CUSP25 | ½ HP | Cast Iron | Vertical / None | 70 GPM | High water table, large basement, severe flooding |
| 5000PVSPBU | — | Thermoplastic | Battery DC | Backup | Power outage protection (alongside primary) |
| 5030CVSPK | 3/10 HP | Cast Iron + Kit | Vertical | 50 GPM | Pre-built drop-in: basin + pump + check + lid |
| 5030CVSPCSK | 3/10 HP | Cast Iron + Kit | Vertical | 50 GPM | Crawl space — low clearance install |
| 5025PTSPCWB | ¼ HP | Thermoplastic + Basin | Tethered | 30 GPM | Clearwater basin — laundry, condensate |
All sump pumps: 120V 60Hz 1Ø, split capacitor motors with thermal overload, lift up to 25 ft of vertical height. Tethered/vertical float type per model. 10' cord standard, 25' optional.
HP Selection — Don't Oversize
¼ HP
Thermoplastic · Budget
Light Duty
▸
For: Standard residential basement, seasonal use, mild water table
▸
Models: 5025PTSP (tethered), 5025PVSP (vertical)
▸
Skip if: wet climate, high water table, finished basement
⅓ HP
Cast Iron · Most Popular
Sweet Spot
▸
For: Most residential applications, the right answer for typical basement
▸
Models: 5033CVSP, 5033CVSPEZ (EZ install)
▸
Best balance: capacity, durability, cost
½ HP
Cast Iron · Heavy Duty
Maximum
▸
For: High water table, large basement, severe flooding risk
▸
Models: 5050CVSP, 5050CUSP25 (25' cord)
▸
Caution: oversizing causes short-cycling — match HP to inflow
Battery Backup & Pre-Built Packages
5000PVSPBU — Battery Backup
12V DC backup pump installs alongside (not replacing) primary AC sump. Runs off deep-cycle marine battery for 6–24 hours during power outages. Replace battery every 3–5 years.
→ Power outage insurance
5030CVSPK — Standard Package
Drop-in kit: 18" basin + 5030CVSP cast iron pump + check valve + lid. Fastest path to a working sump system for new construction or full retrofit.
→ New construction
5033CVSPEZ — EZ Install
⅓ HP cast iron with EZ install hardware — pre-routed check valve, easier float adjustment. Best for retrofit on existing basin.
→ Retrofit replacement
5030CVSPCSK — Crawl Space Kit
Low-profile package for crawl space installs where ceiling clearance is limited. Smaller basin, low-clearance pump, integrated lid.
→ Crawl space
5025PTSPCWB — Clearwater Basin
¼ HP thermoplastic + clear water basin (clear-bodied, visibility into sump). Ideal for laundry trays, dehumidifier discharge, condensate handling.
→ Laundry / condensate
Tethered vs Vertical Float
Tethered (T): wider on/off range, fewer cycles, needs basin ≥ 18". Vertical (V): narrower range, fits tight basins. None (U): for external alarm/duplex panels.
→ Switch selection
Below-Grade Bathrooms · Code-Compliant 2" Discharge
Sewage Pumps — Baker DuraMAC SJ Series
Move raw sewage from below-grade bathrooms, basement plumbing, and ejector pits to the main line. Cast iron construction, stainless steel non-clogging vortex impeller, 2" solids handling, code-compliant 2" NPT discharge.
5050C Sewage Lineup
| Model | HP | Switch | Cord | Performance | Best For |
|---|---|---|---|---|---|
| 5050CTSJ | ½ HP | Tethered | 10' | 80 GPM @ 0 ft, 2 GPM @ 25 ft | Standard residential |
| 5050CTSJ25 | ½ HP | Tethered | 25' | 80 GPM @ 0 ft | Long install runs |
| 5050CVSJ | ½ HP | Vertical | 10' | 80 GPM @ 0 ft | Tight basin / narrow pit |
| 5050CUSJ | ½ HP | None (utility) | 10' | 80 GPM @ 0 ft | External controls, duplex |
| 5050CTSJ15 / CVSJ15 | ½ HP | Tethered / Vertical | 15' | 140 GPM @ 0 ft, 25 GPM @ 25 ft | High volume — multi-fixture |
| 5050CTSJH25 | ½ HP | Tethered · High Head | 25' | 140 GPM @ 0 ft, 30 ft max lift | High head + high volume |
All 5050C sewage: 120V 60Hz 1Ø, 7.6A, cast iron body, SS non-clogging vortex impeller, 2" NPT discharge, 2" solids handling, 3450 RPM, thermal overload protected.
5050CTSJPAC — Pre-Built Simplex Sewage Packages
5050CTSJPAC — Standard Simplex
18"×30" basin + 5050CTSJ pump + check valve + sealed lid + alarm. Drop-in for new install or full system replacement.
→ Standard residential
5050CTSJPAC24 — 24×24 Basin
Larger 24"×24" basin variant for higher capacity or where local code requires bigger storage volume.
→ Higher capacity
5050CTSJPACSDA — NEMA 3R Alarm
Outdoor-rated NEMA 3R alarm for exterior or basement installs requiring weather-tight enclosure. Pre-wired sounder + visual alarm.
→ Outdoor / NEMA 3R
5050CTSJPACDA1 — NEMA 1 Tank Alarm
Indoor NEMA 1 alarm for standard interior basement installs. Pre-wired alarm package.
→ Standard interior
5050CTSJPACSL — Split Lid
Simplex with split-lid basin for service access without removing entire lid. Useful where overhead clearance is limited.
→ Limited clearance
Custom Duplex Configurations
Redundant lead/lag systems with two 5050CUSJ pumps + duplex control panel + alarm. For commercial or high-availability residential.
→ Custom · contact us
⚠ Code Requirements for Residential Sewage
IPC and UPC require: (1) 2" minimum discharge pipe (smaller clogs); (2) high-water alarm system; (3) sealed gas-tight basin lid; (4) vent terminating outside; (5) dedicated electrical circuit (don't share with other appliances); (6) approved check valve. The Baker PAC packages bundle code-compliant components — buying components separately, double-check each meets your local code.
Septic · Greywater · Lift Stations
Effluent Pumps — Baker DuraMAC EF Series
Move pre-treated water — septic effluent, greywater, dewatering — to leach fields, drain fields, or lift stations. ¾" solids handling, cast iron and thermoplastic, with high-head variants for elevated mound systems.
Effluent Pump Lineup
| Model | HP | Switch | Cord | Max Lift | Best For |
|---|---|---|---|---|---|
| 5033CTEF25 | ⅓ HP | Tethered | 25' | ~50 ft | Standard residential septic |
| 5033CUEF | ⅓ HP | None (utility) | 10' | ~50 ft | External time-dose panels |
| 5040CTEFH25 | 4/10 HP | Tethered · High Head | 25' | ~70 ft | Mound systems · elevated drain |
| 5050CTEF / CTEF25 | ½ HP | Tethered | 10' / 25' | ~50 ft | Higher flow standard residential |
| 5050CTEFH25 | ½ HP | Tethered · High Head | 25' | ~70 ft | Premium mound · elevated drain |
| 5050CUEF / CUEFH25 | ½ HP | None / High Head | 10' / 25' | ~50–70 ft | Engineered time-dose systems |
| 5050CVEF | ½ HP | Vertical | 10' | ~50 ft | Tighter dose tanks |
EF = Effluent. CT = Cast Tethered, CV = Cast Vertical, CU = Cast Utility. H = High head (re-engineered impeller for higher TDH). Cast iron body, SS vortex impeller, ¾" solids handling, thermal overload protected. 120V 60Hz 1Ø.
⚠ Effluent Pumps Are NOT Sewage Pumps
Effluent pumps handle pre-treated water — water that has already passed through a septic tank where large solids settled out. They handle ¾" solids only. Try to pump raw sewage with an effluent pump and the impeller will jam within hours, motor will overheat, and warranty won't cover it. If your application has a toilet upstream WITHOUT a septic tank in between, you need a sewage pump (5050C SJ series) — not effluent.
When to Choose High-Head (H) Variants
Standard effluent pumps lose flow rapidly above ~30 ft of TDH. The "H" suffix variants (5040CTEFH25, 5050CTEFH25, 5050CUEFH25) use a re-engineered impeller for sustained flow at higher head. Choose H when:
Drain field elevated 10+ ft above dose tankMound system with pressure distributionSand filter requires 4–5 PSI residualLong discharge run with multiple bendsCalculated TDH at design flow exceeds 30 ft
Dosing Strategies for Effluent Systems
Demand Dosed (Float-Switched)
Pump runs whenever water rises to switch on-point. Standard residential setup. Use CTEF (tethered) or CVEF (vertical).
→ Standard residential
Time Dosed (Panel-Controlled)
External controller cycles pump on programmable timer. Required for mound systems, sand filters, advanced treatment. Use CUEF (no switch).
→ Engineered systems
Pressure Dosed
Pump delivers calculated dose volume per cycle for pressure distribution drain fields. CUEF + control panel + pressure transducer.
→ Pressure distribution
Pressure Sewer · Long Discharge · High Lift
Grinder Pumps — Baker GRP Series
When sewage pumps can't deliver — long discharge runs, high TDH, pressure sewer mains — grinders are the answer. 440 stainless steel cutter assembly grinds 24,000 cuts per second through 3" solids. 1¼" discharge (small line because solids are ground), 103 ft TDH, 44 GPM, 3-year warranty.
Grinder Pump Lineup
| Part No. | Model | HP | Voltage | Switch | Notes |
|---|---|---|---|---|---|
| 6194-001 | 110911GRP | 1 HP | 115V 1Ø | Manual | 13A · pair with external control panel |
| 6194-002 | 110911GRPA | 1 HP | 115V 1Ø | Wide-Angle Float | 13A · automatic stand-alone operation |
| 6194-011 | 110912GRP | 1 HP | 208–230V 1Ø | Manual | 6.5A · lower current for longer runs |
| 6194-012 | 120912GRP* | 2 HP | 208–230V 1Ø | Manual | 15A · *requires external capacitors |
| 6194-003 | 120212GRP | 2 HP | 208–230V 1Ø | Manual | 15A · internal capacitors (simpler) |
All Baker grinders: 1¼" NPT vertical discharge (optional 2" FNPT adapter), 3" solids cut, 103 ft TDH max, 44 GPM max, 140°F intermittent liquid temp, oil-filled motor with upper/lower ball bearings, single mechanical seal (carbon-rotating/ceramic-stationary, Buna-N, 300 SS), 20' cord standard. 75–78 lb weight. 3-year warranty from manufacture date.
Cutter Assembly & Motor
①
440 SST Cutter (56–60 Rockwell)
Hardness comparable to industrial knife blades. Cuts fabric, sanitary products, paper, biological solids without dulling. 24,000 cuts/sec at 3450 RPM = 1.5M cuts/min.
②
Cast Iron Vortex Impeller
Non-clog cast iron vortex pushes ground slurry through 1¼" discharge. Designed for non-overloading high-head performance.
③
Oil-Filled Motor
Constant lubrication, max cooling — runs cooler and lasts longer than dry-stator designs. Class F permanent split capacitor.
④
Sealed Quick-Disconnect Cord
Prevents water ingress through cord cuts. 20' standard, up to 30' with plug, 100' without plug.
When Grinder Beats Sewage Pump
Specify a grinder (not sewage) when: (1) discharge run exceeds ~100 ft horizontal; (2) TDH exceeds 30 ft; (3) system is part of a municipal pressure sewer (PSP) network; (4) 2" discharge piping won't fit through framing or conduit; (5) cold-climate buried piping where smaller-diameter pressure line resists freezing better. For typical short-run residential basement bathroom, sewage ejector (5050C SJ) is adequate — don't over-engineer.
⚠ 120912GRP External Capacitor Note
The 120912GRP 2 HP variant requires external start and run capacitors mounted in the control panel — not included with the pump. Verify your control panel includes capacitor mounting and proper wiring. The 120212GRP is the simpler choice when starting fresh — capacitors are internal, no external panel components required beyond standard contactor/float controls.
When to Use the 2" FNPT Adapter
Baker grinders ship with 1¼" vertical discharge as standard. The optional 2" FNPT adapter is recommended when discharge run exceeds ~50 ft because friction loss in 1¼" pipe at sustained flow is significant. A 2" line at the same flow has ~75% lower friction loss — worth the slightly higher pipe cost on long runs. Rule of thumb: if calculated friction is more than 30% of total TDH, upsize the discharge.
Portable · Water Removal · Transfer
Utility Pumps — Baker 5020PUUP
Quick water removal jobs — pool drain-down, basement flood cleanup, water transfer, garden hose discharge. Compact thermoplastic design fits in a 6" or larger opening, includes garden hose adapter, lifts water 25 ft.
The 5020PUUP is the only Baker utility pump and the right answer for portable water removal jobs. ⅕ HP continuous-duty thermoplastic pump with sleek design that fits in a 6" or larger opening — pool skimmers, drain pits, narrow basins, sump pits, anywhere a standard pump can't fit. 3/4" garden hose adapter included, large 1¼" discharge for high capacity, clog-resistant impeller.
HP: 1/5 HPFlow: 26 GPMMax Lift: 25 ftDischarge: 1¼" + ¾" hose adapterSolids: 1/8"Fits: 6" opening
⚠ Utility Pump Is NOT a Sump Pump
Utility pumps are designed for occasional, portable use — drain a pool, clean up a flood, transfer water from a tank. They are NOT designed for: (1) permanent sump basin installation; (2) automatic float-switched operation; (3) continuous duty cycling. For permanent basement sump duty, use a real sump pump (5025/5030/5050 SP series). Utility pumps in permanent installations fail within months — they're built for hours of use, not years.
5020PUUP Specifications
Part No.6190-145
HP1/5 HP
Voltage120V 60Hz 1Ø
Amps3.6
ConstructionThermoplastic
Discharge1¼" NPT (¾" hose adapter included)
Solids Handling1/8"
Cord Length10'
RPM3450
Weight8 lbs
Performance26 GPM @ 0 ft, 14 GPM @ 10 ft, 1 GPM @ 25 ft
When to Use a Utility Pump
🏊 Pool Drain-Down
Annual pool drain or partial drain for cleaning. Connect garden hose, drop pump in, pump to street or yard.
→ 5020PUUP + garden hose
💧 Basement Flood Cleanup
Storm-flooded basement, burst pipe, water heater leak. Quick removal job — pump runs until water is below intake.
→ Portable + manual operation
🚰 Tank-to-Tank Transfer
Move water from one container to another — rain barrel to garden bed, holding tank to drain, etc.
→ Garden hose discharge
⚓ Boat Bilge Backup
Emergency portable bilge pumping when primary bilge fails. NOT a permanent install — temporary use only.
→ Emergency use
🏗️ Construction Dewatering
Pumping out a foundation hole, footing, or excavation prior to concrete work. Hours of use, then move on.
→ Job site portable
🚿 Drain Tray Service
Furnace condensate tray, water heater drain pan, washing machine drain — emergency manual pump-out.
→ Service backup
Available · Quote Only · Authorized Xylem Dealer
Goulds · Flygt · Liberty · E/One — Commercial & Engineered
When the application exceeds Baker's residential and light commercial scope — commercial sewage, municipal lift stations, engineered pressure sewer systems, multi-unit residential — we route to Xylem and partner brands. Same-business-day quote turnaround.
Goulds WS Series
Commercial submersible sewage and effluent. ½ HP through 7½ HP. Cast iron and stainless options. Up to 6" solids handling on larger models.
→ Commercial sewage / effluent
Goulds 3SE Submersible
Compact cast iron submersible with stainless mechanical seal. Built for residential through light commercial. 2" solids, 2" discharge.
→ Premium residential
Goulds GTGSP Heavy-Duty
Industrial sump and effluent for manufacturing, food processing, high-cycle commercial. Cast iron, premium seals.
→ Industrial high-cycle
Flygt — Heavy Industrial
Xylem's premier industrial wastewater line. Used in municipal lift stations, treatment plants, industrial process. Adaptive non-clog impeller technology.
→ Lift stations · municipal
Liberty Pumps LSG/LSGX Grinder
Liberty residential grinder series — popular spec for residential pressure sewer when "Liberty or equal" is specified by engineer.
→ Spec replacement
E/One Sewer Systems
The market-leading engineered low-pressure sewer (LPS) system. Pre-packaged grinder + tank + control panel for new pressure sewer subdivisions.
→ Subdivision LPS network
When to Quote Xylem vs Stock Baker
Choose Baker DuraMAC for residential applications, replacement on existing Baker installs, and same-day shipping. Choose Xylem when: (1) spec calls for "Goulds or equal" / "Flygt or equal" / "Liberty or equal" / "E/One or equal"; (2) commercial duty > 50 cycles/day; (3) three-phase power required; (4) solids handling beyond 2" required; (5) hospital/restaurant/multi-unit where downtime = code violation; (6) new municipal pressure sewer subdivision development. Email sales@watermainsupply.com with engineer's specs and we quote same business day.
Technical Reference
Sizing Guide — All 5 Pump Types
Three-step methodology applies across sump, sewage, effluent, and grinder pumps. Utility pumps are sized by the job (volume to move, time available).
Step 1 — Determine Required Flow (GPM)
| Pump Type | Application | Typical Flow | Recommended Model |
|---|---|---|---|
| Sump | Standard residential basement | 5–15 GPM | 5033CVSP / 5033CVSPEZ |
| Sump | High water table / wet climate | 15–30 GPM | 5050CVSP / 5050CUSP25 |
| Sewage | Single basement bathroom | 20–30 GPM peak | 5050CTSJ / 5050CVSJ |
| Sewage | Multi-bath whole-house below grade | 50–80 GPM peak | 5050CTSJ15 / 5050CTSJH25 |
| Effluent | Residential septic dose tank | 15–25 GPM | 5033CTEF25 / 5050CTEF |
| Effluent | Mound system / elevated drain | 25–40 GPM @ high TDH | 5040CTEFH25 / 5050CTEFH25 (H variants) |
| Grinder | Single-family pressure sewer | 10–15 GPM | 110911GRP / 110912GRP (1 HP) |
| Grinder | High-lift / long-run / commercial | 25–44 GPM | 120212GRP (2 HP) |
| Utility | Job-by-job portable | up to 26 GPM | 5020PUUP |
Step 2 — Calculate Total Dynamic Head (TDH)
TDH = Vertical Lift + Friction Losses + Discharge Backpressure
Vertical lift = pump → highest discharge point1¼" PVC: ~13 ft / 100 ft @ 30 GPM2" PVC: ~3 ft / 100 ft @ 30 GPM90° elbow ≈ 5 ft equivalentCheck valve ≈ 5 ft equivalentSewage TDH > 30 ft → consider grinderEffluent TDH > 30 ft → choose H variant
Step 3 — Match Construction to Water Chemistry
Thermoplastic (P)
Budget residential, clean water, mineralized well water (won't corrode). Best for ¼ HP sump and effluent thermoplastic series. Light duty cycle.
→ Sump · greywater · light duty
Cast Iron (C)
Continuous duty, sewage chemistry, high-cycle counts, heat dissipation. Standard for sewage, grinder, most effluent. Required for ½ HP and above.
→ Sewage · grinder · ½ HP+
SS Vortex Impeller
Stainless steel non-clogging vortex impellers handle solids without contacting blade tips — passes 2" solids in sewage, ¾" in effluent.
→ Sewage · effluent solids handling
Code Compliance Checklist (Sewage / Effluent / Grinder)
Sewage discharge: 2" minimum (IPC/UPC)High-water alarm requiredSealed gas-tight basin lid requiredVent terminating outside requiredDedicated electrical circuit requiredApproved check valve required
Technical FAQ
Common Questions Across All 5 Categories
What's the difference between sump, sewage, effluent, grinder, and utility pumps?
Sump = clean groundwater, ⅛"–½" solids, 1¼"–1½" discharge. Sewage = raw blackwater with toilet waste, 2" solids, 2" discharge required by code. Effluent = pre-treated water (post-septic, greywater), ¾" solids, 1½"–2" discharge. Grinder = cuts solids before pumping for pressure sewer, 3" cut, 1¼" discharge, 103 ft TDH. Utility = portable transfer for water removal jobs, NOT for permanent installation. Confusing categories is the #1 source of premature failure.
Can I use a sump pump for sewage?
No — sump pumps handle clean water with ⅛"–½" solids. Raw sewage contains 2"+ solids that will clog a sump pump within hours. Use a real sewage pump (5050C SJ series) for any application with toilet waste upstream of the pump. Code in most jurisdictions requires 2" minimum discharge for sewage applications, which sump pumps don't have.
How do I read a Baker DuraMAC model number?
Read left to right per the decoder above: 5=DuraMAC series, 020/025/030/033/040/050=HP code, C/P=construction (cast iron / plastic), T/V/U=switch (tethered/vertical/utility), UP/SP/EF/SJ/PD=pump type (utility/sump/effluent/sewage ejector/pedestal), specials=cord length, EZ install, high-head, battery backup, etc. Example: 5050CTSJH25 = ½ HP cast iron tethered sewage ejector with high head and 25' cord.
When do I need a grinder pump instead of a sewage pump?
Specify a grinder when: (1) discharge run exceeds ~100 ft horizontal; (2) TDH exceeds 30 ft; (3) system is part of a municipal pressure sewer network; (4) 2" discharge piping won't fit; (5) cold-climate buried piping where smaller pressure line resists freezing better. For typical short-run residential basement bathroom, sewage pump is adequate — don't over-engineer.
Why does code require 2" discharge for sewage pumps?
IPC and UPC mandate 2" minimum on sewage pump discharge specifically because the pump moves solids upward at velocity. Gravity drains can use 1½" because solids fall freely; pumped lines need larger diameter to maintain transport velocity and prevent clogging. The Baker 5050C SJ series is built around 2" discharge — don't reduce it to match existing branch lines, run a separate 2" discharge to where it ties into the gravity main.
Should I oversize my sump pump just to be safe?
No — oversizing is the #1 cause of premature sump pump failure. An oversized pump empties the basin faster than water flows in, then short-cycles repeatedly. Each on/off cycle stresses the motor — frequent cycling = early failure. Size to your measured peak inflow rate with 30-50% margin. Most homes are correctly served by ⅓ HP cast iron (5033CVSP). Only step up to ½ HP for high water tables, large basements, or severe flooding risk.
Tethered or vertical float — which switch type?
Same logic across sump, sewage, and effluent: tethered (T) = wider on/off range, fewer cycles, requires basin ≥ 18" diameter for free swing. Vertical (V) = narrower range, more cycles, fits tight basins where tethered float would catch on basin wall. None / Utility (U) = no switch, for external alarm/duplex/time-dose panel control. Default for modern 18" basins: vertical. Default for older 24"+ basins: tethered.
My pump is short-cycling. What's wrong?
Three causes across all submersible pump types: (1) Failed check valve — water bleeds back into basin between cycles. Replace check valve. (2) Pump oversized — empties basin faster than inflow. Move to smaller HP. (3) Float differential too narrow — switch on/off range too small. Adjust tethered float for wider swing or replace with adjustable vertical switch.
Do I need an alarm on my sewage or effluent pump?
Yes for code compliance in most jurisdictions, and yes for system protection regardless of code. Without an alarm, a failed pump leads to: sewage backing up into the bathroom, septic dose tank overflow, drain field flooding (drain field replacement = $5,000–15,000). Alarms cost $50–150 — they're insurance against catastrophic failure. The Baker simplex packages (PAC, PACSDA, PACDA1) include code-compliant alarms.
Can I install a battery backup with any sump pump?
The Baker 5000PVSPBU is a complete battery backup system that installs alongside (not replacing) your existing primary AC sump pump. Your primary handles routine operation off grid power; the backup activates when grid power fails. Replace the deep-cycle marine battery every 3-5 years. Test the system at least twice a year by unplugging the AC primary and watching the backup activate.
How long do these pumps last?
Properly-sized cast iron pump in residential service: 7–10 years typical. Thermoplastic pumps in light service: 5–7 years. Grinder pumps with 3-year warranty often run 10+ years if maintained. Premature failures (under 5 years) almost always trace to: oversizing causing short-cycling, wrong pump type for application (sump used for sewage, effluent used for raw waste), failed float switch causing lockup, or improper waste damaging the impeller.
What's the warranty on Baker pumps?
Baker provides 1-year limited warranty on residential sump, sewage, effluent, and utility pumps with extended warranty options available. Baker grinder pumps carry a 3-year manufacturer warranty from date of manufacture. We register the warranty with Baker at the time of shipment so you're covered without paperwork. Premature failures should be reported through us — we coordinate the warranty claim and cross-ship a replacement when necessary.
Are you an authorized Baker dealer?
Yes — Watermain Supply (DBA of E4 Industrial LLC) is an authorized Baker Water Systems dealer, plus authorized for A.Y. McDonald, Davey, and Xylem (Goulds Water Technology, Lowara & Flygt). All products ship factory-direct or from Houston stock with full manufacturer warranty.
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