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Campbell Well Seals
Availability
Type
Price
$0
$1,454.46
Campbell ABS Well Seal - Submersible Single Hole
Campbell
Campbell ABS Well Seal - Submersible Single Hole
- Price
- From $48.84
Campbell Cast Iron Well Seal - Double Hole
Campbell
Campbell Cast Iron Well Seal - Double Hole
- Price
- From $99.22
Campbell ABS Well Seal - Jet Pump Double Hole
Campbell
Campbell ABS Well Seal - Jet Pump Double Hole
- Price
- From $50.72
Campbell ABS Well Seal - Jet Pump Single Hole
Campbell
Campbell ABS Well Seal - Jet Pump Single Hole
- Price
- From $48.84
Campbell Cast Iron Well Seal - Single Hole
Campbell
Campbell Cast Iron Well Seal - Single Hole
- Price
- From $124.40
Campbell Well Seals
Cast Iron & ABS Well Seals
Campbell Well SealsSUB Cast Iron · PS Series ABS · All Casing Sizes
Cast iron (SUB series) and ABS (PS series) well seals in 4 in, 4½ in, 5 in, 5 5/8 in, 6 in, and 6 1/4 in casing sizes. Single-hole for submersible installs and double-hole for jet-pump systems. Plus pump screens and well-seal vents.
2
Materials (CI + ABS)
6
Casing Sizes
3/4–2"
Pipe Range
170+
Catalog SKUs
Cast Iron vs ABS — Which to Choose
Both seal water equally well when sized correctly. The choice is driven by water chemistry, system permanence, and budget.
SUB — Cast Iron Well Seal
Premium · Long-Life · Permanent Install
The traditional well seal. Cast iron upper plate with neoprene gasket and steel bolts. Standard for submersible installations. Solid and split versions for retrofit work where you can't pull the drop pipe. SUB6X1, SUB4X1 1/4, SUB6X2 are the highest-velocity SKUs.
MaterialCast iron + neoprene
Casing Sizes4, 4.5, 5, 5 5/8, 6, 6.25 in
Pipe HolesSingle · Double
VariantsSolid · Split (-S, -GS)
Best ForPermanent · deep submersible
PS — ABS Well Seal
Lightweight · Corrosion-Immune · Lower Cost
Engineered ABS upper plate. Roughly half the cost of cast iron and corrosion-immune to iron-laden, salty, or chemically active groundwater. Standard size range matches cast iron. Ideal for shallow wells, jet-pump installs, and Gulf Coast water chemistry.
MaterialABS + neoprene
Casing Sizes4, 5 5/8, 6, 6.25 in
Pipe HolesBlank, Single, Jet
PDJ ModelsABS jet seals
Best ForJet pump · high-iron water
Submersible Pump Screens
SPS Series · Sand & Grit Protection
Stainless mesh screens that surround the submersible pump intake. Available in .010, .015, .020, and .060 slot sizes for varying sand grades. 4 in by 60 in standard length covers most residential pumps. Critical in sandy aquifers — one screen costs less than one pump rebuild.
Length60 in standard
Diameter4 in (fits 4 in pumps)
Slot Sizes.010, .015, .020, .060
MaterialStainless wire mesh
Well Seal Vents
Atmospheric Balance · Pitcher Pump Compatibility
Vent tubes for well seals where atmospheric balance is required — pitcher-pump installations, shallow wells with high water-table swing, and any application where the casing needs to breathe. Threaded into the seal's vent port. Includes screened end to keep insects out.
ApplicationPitcher pump · shallow well
ConnectionThreaded vent port
MaterialGalvanized + screen
LengthStandard above-grade
Cast Iron Sizing Reference (SUB Series)
Match seal to casing OD (not ID) and pipe size. Single = submersible drop pipe only; Double = jet pump suction + pressure pipes.
| Part Number | Casing | Pipe Sizes | Hole Config | Application |
|---|---|---|---|---|
| SUB4X1G | 4 in | 1 in galvanized | Single | Standard residential submersible |
| SUB4X1 1/4 | 4 in | 1 1/4 in | Single | Larger 4 in casing submersible |
| SUB4X2GS | 4 in | 2 in | Single (Split) | Retrofit on 2 in drop pipe |
| SUB4 1/2X1 | 4 1/2 in | 1 in | Single | 4 1/2 in casing systems |
| SUB5X1 | 5 in | 1 in | Single | 5 in casing residential |
| SUB5X1 1/4 | 5 in | 1 1/4 in | Single | 5 in casing larger pump |
| SUB5X2 | 5 in | 2 in | Single | Larger residential / commercial |
| SUB5 5/8X1 | 5 5/8 in | 1 in | Single | 5 5/8 in casing standard |
| SUB5 5/8X1 1/4 | 5 5/8 in | 1 1/4 in | Single | 5 5/8 in casing larger pump |
| SUB6X3/4 | 6 in | 3/4 in | Single | 6 in casing small pump |
| SUB6X1 | 6 in | 1 in | Single | 6 in casing standard |
| SUB6X1 1/4 | 6 in | 1 1/4 in | Single | 6 in casing larger pump |
| SUB6X1 1/2 | 6 in | 1 1/2 in | Single | 6 in casing commercial |
| SUB6X2 | 6 in | 2 in | Single | 6 in casing high-flow |
| SUB2X1 1/4GS | 2 in | 1 1/4 in | Single (Split) | 2 in casing driven well |
Suffix legend: G = galvanized pipe size match · S = split (retrofit) · GS = galvanized + split. Solid seals require the drop pipe to be threaded through; split seals open and reclose around an existing pipe.
ABS Sizing Reference (PS Series)
ABS seals follow the same casing-OD logic. PDJ series is purpose-built for jet-pump installs (4 in casing, 1 in suction, 3/4 in pressure).
| Part Number | Casing | Pipe Sizes | Type | Application |
|---|---|---|---|---|
| PS4 BLANK | 4 in | (no holes) | Blank | Cap-only / future drilling |
| PS4X1 | 4 in | 1 in | Single (Sub) | 4 in casing submersible |
| PS4X1 1/4 | 4 in | 1 1/4 in | Single (Sub) | 4 in casing larger pump |
| PS4X1 1/2 | 4 in | 1 1/2 in | Single (Sub) | 4 in casing commercial |
| PS4X2 | 4 in | 2 in | Single (Sub) | 4 in casing high-flow |
| PS5 5/8X1 | 5 5/8 in | 1 in | Single (Sub) | 5 5/8 in standard |
| PS5 5/8X1 1/4 | 5 5/8 in | 1 1/4 in | Single (Sub) | 5 5/8 in larger pump |
| PS6 BLANK | 6 in | (no holes) | Blank | Cap-only / future drilling |
| PS6X1 | 6 in | 1 in | Single (Sub) | 6 in standard residential |
| PS6X1 1/4 | 6 in | 1 1/4 in | Single (Sub) | 6 in casing larger pump |
| PS6X1 1/2 | 6 in | 1 1/2 in | Single (Sub) | 6 in commercial |
| PS6X2 | 6 in | 2 in | Single (Sub) | 6 in high-flow |
| PS6 1/4 BLANK | 6 1/4 in | (no holes) | Blank | 6 1/4 in casing cap |
| PS6 1/4X1 1/4 | 6 1/4 in | 1 1/4 in | Single (Sub) | 6 1/4 in submersible |
| PDJ4A | 4 in | 1 in suction + 3/4 in pressure | Double (Jet) | 4 in casing jet-pump install |
Installation Best Practices
A well seal is the only barrier between groundwater and surface contamination. Install it once, install it right.
Measure Casing OD First
Wrap a tape around the casing and divide circumference by 3.14 to get OD. Never trust nominal labels — PVC well casing OD differs from steel even at the same nominal size.
Solid vs Split
Solid seal is preferred for new installs — lower cost, fewer leak paths. Split seal (-S or -GS) is for retrofits where you can't unthread the drop pipe to slide a solid seal over.
Torque Sequence
Tighten bolts in a star pattern, then re-torque after 30 minutes. Casing-clamp bolts seat the rubber gasket evenly — one-side-only torque tilts the seal and leaks immediately.
Match Pipe Size Exactly
Pipe-hole gaskets are sized to one nominal pipe OD. 1 in galvanized is not the same OD as 1 in PVC — specify the pipe material when ordering, especially on G-suffix seals.
Sanitary Compliance
Most state well codes require a watertight seal at the casing top. The well seal sits below grade with a watertight cap above — never substitute a vented cap as the seal.
Vent if Pumping Atmospheric
Pitcher pumps and shallow-well jet pumps need a vent for atmospheric pressure balance. Add the vent kit at install — don't drill the cap later.
Application Selection
New Submersible Install — 4 in casing
Use SUB4X1G or SUB4X1 1/4 (cast iron) for permanent installs. Use PS4X1 or PS4X1 1/4 (ABS) for budget or high-iron water.
New Submersible Install — 6 in casing
Use SUB6X1 or SUB6X1 1/4 for residential. SUB6X1 1/2 or SUB6X2 for commercial / multi-family with larger drop pipe.
Jet Pump Install
Use PDJ4A ABS jet seal (4 in casing, 1 in suction + 3/4 in pressure). For 6 in casings, specify a custom double-hole cast iron seal — we'll match drilled holes to your suction and pressure pipe sizes.
Retrofit / Replace Without Pulling Pump
Use split seal (-S or -GS suffix). Opens around the existing drop pipe and re-bolts. SUB4X2GS, SUB6X1G — these save a full pump pull on a leak repair.
High-Iron / Coastal Water
Use ABS PS series. Cast iron stains and pits in iron-laden or salty groundwater — ABS is immune. Pair with stainless well cap.
Sandy Aquifer
Add SPS4X60 stainless pump screen around the submersible intake. Slot size: .010 for fine sand, .020 for medium, .060 for coarse. Saves the pump on dirty wells.
Frequently Asked Questions
How do I measure my casing for the right well seal?
Wrap a tape measure around the outside of the casing at the top and divide the circumference by 3.14 (pi) to get the outside diameter. Match that OD to the seal model number — SUB4 = 4 in OD casing, SUB6 = 6 in OD casing. Don't measure the inside diameter; seals clamp the outside.
Cast iron or ABS — which is better?
Both seal water identically when sized correctly. Cast iron (SUB) is the long-life premium choice for permanent submersible installs and clean water. ABS (PS) is corrosion-immune — specify it for high-iron, salty, or chemically active water. ABS is also lighter and roughly half the cost.
Single hole vs double hole — what's the difference?
Single hole is for submersible installs — one hole for the drop pipe carrying water up from the pump. Double hole is for jet-pump installs — one hole for the suction line going down, one for the pressure return line. Add a third small hole only if you're adding a vent or pitless lateral.
What does the G suffix mean?
G = galvanized pipe sizing. Galvanized steel pipe has a slightly different OD than PVC at the same nominal size, so the gasket hole is sized differently. SUB4X1G fits 1 in galvanized drop pipe; SUB4X1 (no G) fits standard 1 in PVC. Always specify your drop-pipe material when ordering.
What does the S or GS suffix mean?
S = split. The seal opens in two halves around an existing drop pipe and bolts back together. Use this for retrofits when you can't pull the pump or unthread the drop pipe. GS = galvanized + split. Combined for retrofitting on a galvanized drop pipe. Solid seals are stronger and cheaper — only buy split when you have to.
Do I need a well seal AND a well cap?
Yes — they serve different purposes. The well seal sits below grade and seals the casing against groundwater intrusion at the drop-pipe penetration. The well cap sits above grade and protects against rain, debris, insects, and surface contamination. Most state well codes require both.
Can I reuse a well seal after pulling the pump?
Technically yes if the gasket isn't compressed or torn, but at $40–$200 for a new seal it's not worth the leak risk. Always replace the seal when pulling the pump. Inspect the casing top for corrosion or out-of-round damage at the same time.
What pump screen slot size do I need?
Depends on aquifer sand grade. Most residential wells: .020 slot handles typical sand. Fine silty water: .010 or .015. Coarse sand and gravel aquifers: .060. If you're not sure, ask your driller what sand grade was logged when the well was drilled.
Need Help Sizing Your Well Seal?
Tell us your casing OD, drop pipe size and material, and whether it's a submersible or jet-pump install. We'll spec the exact Campbell SKU and ship from Houston same day.
281.664.8000
Watermain Supply · Authorized Campbell Manufacturing Distributor · Houston, TX
281.664.8000 · sales@watermainsupply.com · www.watermainsupply.com
281.664.8000 · sales@watermainsupply.com · www.watermainsupply.com
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