Campbell Electrical Accessories

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Square D · SJE-Rhombus · Heat Shrink

Electrical AccessoriesPressure Switches · Float Switches · Alarm Panels · Splice Kits

Square D 9013 pressure switches in standard ranges. SJE-Rhombus mercury and mechanical PumpMaster float switches. Indoor/outdoor alarm panels. LSK heat-shrink splice kits in 2, 3, and 4-wire configurations from #14 through #4 wire gauge. UL/CSA-listed throughout.

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Switch Ranges

SJE

Float Switch Brand

Listed Switches

55+

Catalog SKUs

Electrical Categories

Pump electrical work falls into three buckets: pressure switching (Square D), level/float switching (SJE-Rhombus), and connection integrity (heat-shrink splice kits). Get all three right and the pump runs reliably for 15–25 years.

Square D Pressure Switches

Standard 9013 Series · Industry Default

Square D 9013 pressure switch — the U.S. industry standard for residential and light-commercial pump control. PS-A model in 30/50 psi range (most common modern residential); PS-B in 20/40 psi range (low-pressure systems and gravity-assisted). Both 1/4 in NPT bottom-mount, factory-set with field-adjustable cut-in and differential.

PS-A30/50 psi switch

PS-B20/40 psi switch

Connection1/4 in NPT bottom

ListingUL / CSA

SJE-Rhombus Mercury Float Switches

JSD / JSU / SSD / SSU / DFD Series

SJE-Rhombus mercury-tube float switches — quieter and longer-life than mechanical alternatives. JSD (10 ft cord, narrow angle, down-style) and JSU (up-style) for sump/effluent. SSD and SSU sealed switches for sewage. DFD differential floats for narrow-band level control. 120V and 230V plus WP (with plug) and WOP (without plug) variants.

Models10JSD, 15JSD, 10JSU, 15JSU, 10SSD, 10SSU, 15DFD

Cord Length10 ft (10), 15 ft (15)

Voltage120V · 230V · 120/230V

VariantsWP (plug), WOP (no plug)

SJE-Rhombus Mechanical Switches

PumpMaster · PumpMaster Plus · Mercury-Free

Mechanical (mercury-free) PumpMaster float switches. PMD (down/empty), PMU (up/fill), PMPD (PumpMaster Plus down), PMPU (PumpMaster Plus up). 120V and 230V WP versions. Required by some jurisdictions where mercury switches are restricted — standard for new municipal lift-station builds.

PumpMaster15PMD, 15PMU (120/230V)

PumpMaster Plus10PMPD, 15PMPD, 15PMPU

Mercury-FreeYes — spring micro-switch

Best ForMunicipal · mercury-restricted

Alarm Panels

Indoor · Outdoor · Auxiliary Contact

SJE-Rhombus alarm panels for sump, sewage, and lift-station service. 101-01H sump basin alarm (UP-style float included). TA-XT indoor/outdoor alarm with audio and visual alert. TA-XT-A adds an auxiliary contact for remote signaling and SCADA integration. Battery-backup options on most models.

Sump Basin101-01H (UP float included)

In/OutdoorTA-XT

w/ Aux ContactTA-XT-A

Best ForHigh-water alert · SCADA

Heat-Shrink Splice Kits (LSK)

2, 3, 4-Wire · #14 thru #4 Gauge

LSK heat-shrink splice kits for submersible cable connections at the wellhead. Available in 2, 3, and 4-wire configurations to match motor wiring. Wire gauge ranges: B/C suffix (#14-10), M (#8), P (#6), T (#4). Black or clear shrink. Factory waterproof — the only correct way to splice a submersible cable.

2-wire #14-10LSK2 B (blk), LSK2 C (clr)

3-wire #14-10LSK3 B, LSK3 C

4-wire #14-10LSK4 B, LSK4 C

Larger GaugeLSK3 M (#8), P (#6), T (#4)

Pressure Switch Quick Reference

Match switch range to your system pressure target. Always set the bladder-tank precharge to 2 psi below cut-in.

Part Number	Cut-In / Cut-Out	Tank Pre-Charge	Application
PS-B	20 / 40 psi	18 psi	Low-pressure / gravity-assisted
PS-A	30 / 50 psi	28 psi	Standard residential
9013 40/60 (special order)	40 / 60 psi	38 psi	Modern residential w/ bladder
9013 50/70 (special order)	50 / 70 psi	48 psi	Two-story homes · long supply runs

Field adjustment: All Square D 9013 switches have two adjustment screws — large screw raises both cut-in and cut-out (range), small screw widens or narrows the gap (differential). Adjust with the system depressurized.

SJE-Rhombus Float Switch Quick Reference

Match cord length to wet-well depth. WP = with plug (residential plug-and-play); WOP = no plug (hardwired through control panel). 120V/230V to match motor voltage.

Part Number	Cord	Style	Voltage	Application
10JSD WOP	10 ft	Down (drain)	120/230V	Hardwired sump / effluent drain
10JSD 120V WP	10 ft	Down	120V	Plug-and-play sump 120V
10JSD 230V WP	10 ft	Down	230V	Plug-and-play sump 230V
15JSD 120V WP	15 ft	Down	120V	Deeper wet well 120V
15JSD 230V WP	15 ft	Down	230V	Deeper wet well 230V
10JSU 120V WP	10 ft	Up (fill)	120V	Tank fill control 120V
15JSU WOP	15 ft	Up	120/230V	Hardwired tank fill
10SSD WOP	10 ft	Sewage Down	120/230V	Sealed for raw sewage drain
10SSU WOP	10 ft	Sewage Up	120/230V	Sealed for sewage tank fill
15DFD 120V WP	15 ft	Differential	120V	Narrow-band level control
15PMD 120V WP	15 ft	PumpMaster Down	120V	Mercury-free drain
15PMD 230V WP	15 ft	PumpMaster Down	230V	Mercury-free drain 230V
15PMPD 120V WP	15 ft	PumpMaster Plus Down	120V	Premium mercury-free drain

Heat-Shrink Splice Kit Reference

LSK splice kits are the only correct way to terminate a submersible pump cable underground or at the wellhead. Match the kit to wire count and gauge.

Part Number	Wires	Gauge	Color	Best For
LSK2 B	2-wire	#14 – #10	Black	2-wire residential pump 120V
LSK2 C	2-wire	#14 – #10	Clear	2-wire pump · visible splice
LSK3 B	3-wire	#14 – #10	Black	3-wire residential pump · standard
LSK3 C	3-wire	#14 – #10	Clear	3-wire pump · visible splice
LSK4 B	4-wire	#14 – #10	Black	4-wire pump (CSCR motors)
LSK4 C	4-wire	#14 – #10	Clear	4-wire pump · visible splice
LSK3 M	3-wire	#8	—	Larger 3-wire pump (3–5 HP)
LSK4 M	4-wire	#8	—	Larger 4-wire pump
LSK3 P	3-wire	#6	—	5–7.5 HP pump
LSK3 T	3-wire	#4	—	7.5+ HP commercial pump
LSK2B-G, LSK3B-G, LSK4B-G	2/3/4-wire	#14 – #10	Generic black	Lower-cost generic alternative

Electrical Best Practices

Pump electrical failures are the #1 cause of unplanned service calls. The fundamentals here prevent 90% of them.

Always Use LSK Splice Kits

Submersible cable splices that aren't heat-shrink encapsulated fail within 2–5 years from water intrusion at the connection. Wire nuts and electrical tape are not acceptable below grade. The LSK kit is the only listed method.

Match Kit to Wire Gauge

An LSK2 B (#14–#10) won't seal properly on #8 wire — the heat-shrink doesn't compress enough. Move up to LSK M (#8), P (#6), or T (#4) for larger pump cable. Most residential pumps are #14–#10; commercial often uses #8 or #6.

Mercury vs Mechanical — Code Driven

Mercury floats (JSD/JSU/SSD/SSU) are quieter and longer-life. Mechanical (PMD/PMU/PMPD) are mercury-free and required in some jurisdictions. Check local code for new municipal builds — mercury restrictions are increasingly common.

Pre-Charge to Switch Range

Bladder tank pre-charge = cut-in pressure minus 2 psi. PS-A 30/50 = 28 psi precharge. Mismatched pre-charge causes switch chatter, short cycling, and bladder failure. Check annually with a tire-valve gauge.

Voltage Match for Floats

120V float for 120V circuit, 230V for 230V. WOP (without plug) for hardwired through a panel; WP (with plug) for plug-and-play residential sump. Universal 120/230V floats simplify stocking but always confirm the breaker voltage.

Alarm Panel for Lift Stations

Any lift station, septic effluent pump, or sewage ejector should have a high-water alarm panel. TA-XT for indoor/outdoor visual + audio; TA-XT-A adds aux contact for SCADA. The alarm goes off when the float trips above the run band — you find out before sewage hits the floor.

Application Selection

Standard Residential Submersible

Use PS-A 30/50 pressure switch + LSK3 B 3-wire splice kit. Most common combination for residential well pumps. 120V or 230V depending on motor.

2-Wire Submersible Pump

Use LSK2 B splice kit instead of LSK3 B. 2-wire motors have built-in starting components — no separate control box needed.

Residential Sump Ejector

Use 10JSD 120V WP mercury float (down-style for drain). Plug-and-play install — no control panel needed for single-pump residential sump.

Septic Effluent Pump

Use 15JSD 120V WP or PMD mechanical. 15 ft cord for typical septic tank depth. Mechanical preferred where mercury restrictions apply.

Tank Fill Control

Use JSU or PMU "up-style" float. The "up" designation means the switch closes (turns pump ON) when the float rises — opposite of drain logic.

Commercial Lift Station

Use SSD/SSU sealed sewage floats + TA-XT alarm panel + TA-XT-A aux contact for SCADA. Hardwired through a control panel. Required for any non-residential wet well.

Mercury-Restricted Jurisdiction

Use 15PMD 120V WP or 15PMPD PumpMaster Plus. Mercury-free mechanical alternatives. Required for new municipal builds in most northeastern and California jurisdictions.

Larger 5+ HP Commercial Pump

Use LSK3 M (#8) or LSK3 P (#6) splice kit. Larger pump cable requires the bigger gauge kit for proper heat-shrink seal.

Frequently Asked Questions

What pressure switch range do I need?

30/50 psi (PS-A) is the most common modern residential range. 20/40 psi (PS-B) for low-pressure or gravity-assisted systems. 40/60 psi pairs with a properly precharged bladder tank for stronger fixture pressure. 50/70 psi for two-story homes or where pressure drops at second-floor showers. All Square D 9013 series — field-adjustable cut-in and differential.

Mercury vs mechanical float — how do I decide?

Mercury floats (JSD/JSU/SSD/SSU/DFD) are quieter, longer-life, and rated for higher current — preferred for residential effluent and sump applications. Mechanical PumpMaster (PMD/PMU/PMPD) use a spring-loaded micro-switch — mercury-free, required by some jurisdictions, and standard in most municipal lift-station builds today. Both work; the choice is usually code-driven.

What's the difference between WP and WOP?

WP = With Plug — the float comes with a piggyback plug that intercepts the pump's power cord. Plug the float into the wall, plug the pump into the float plug. Plug-and-play residential install. WOP = Without Plug — the float wires terminate at a control panel for hardwired commercial installs.

Can I splice a submersible cable with wire nuts and tape?

No. Wire nuts and electrical tape are not water-tight at any depth, will fail from corrosion within 2–5 years, and are not listed for submersible use. The only correct method is a heat-shrink splice kit (LSK series) with adhesive-lined heat-shrink that bonds to the cable jacket. The kit is $15–$80 — cheap insurance against pulling the pump for an electrical failure.

3-wire vs 2-wire pump — which kit?

Match the splice kit to the motor type. 2-wire motors have built-in starting components and use 2 conductor + ground — LSK2. 3-wire motors need a separate control box at the wellhead and use 3 conductor + ground — LSK3. 4-wire CSCR motors use 4 conductor + ground — LSK4. Always check the pump nameplate for wire count.

What's "down" vs "up" style on a float switch?

Down-style (D suffix) = switch closes (pump ON) when float DROPS — standard for drain applications (sump, sewage, effluent). Up-style (U suffix) = switch closes when float RISES — standard for tank fill applications (cistern, holding tank fill from a well). Reversing these two will run the pump dry or overflow the tank.

Why specify a high-water alarm panel?

Any lift station, sewage ejector, or septic pump should have a high-water alarm. The alarm float sits above the pump's run-on float — if the pump fails or the system overflows, the alarm trips and you get audio + visual warning before the wet well overflows. The TA-XT panel provides indoor or outdoor mounting; TA-XT-A adds an aux contact for SCADA or remote monitoring.

How long do mercury floats last?

Properly installed SJE-Rhombus mercury floats typically last 10–15 years in residential service and 5–10 years in heavy commercial. Failure mode is usually cord abrasion at the wet-well wall, not the mercury switch itself. Inspect the cord for abrasion at every pump service. Replace as a preventive measure on commercial installs at the 7–10 year mark.

Field-adjusting a Square D pressure switch?

Two screws inside the cover. Large screw raises both cut-in and cut-out (the entire range slides up). Small screw widens or narrows the differential (the gap between cut-in and cut-out). Always depressurize the system before adjusting. Use a calibrated pressure gauge on the tank tee to verify final settings.

Need Pump Electrical Components?

Tell us your pump make/model, voltage, wire count, and application. We'll spec the correct switch, float (or floats), splice kit, and alarm panel. Same-day shipping from Houston on stocked items.

281.664.8000

Email sales@watermainsupply.com Call Now

Watermain Supply · Authorized Campbell Manufacturing Distributor · Houston, TX
281.664.8000 · sales@watermainsupply.com · www.watermainsupply.com

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