Hayward HPX2181 Water Flow Pressure Switch for HeatPro Heat Pumps
Hayward HPX2181 Water Flow Pressure Switch for HeatPro Heat Pumps
Hayward HPX2181 Water Flow Pressure Switch for HeatPro Heat Pumps
When a HeatPro heat pump refuses to fire and shows a flow fault even though the pump is running, the usual culprit is the flow pressure switch — the heater will not run until this switch proves water is actually moving through it. This Hayward HPX2181 is the genuine replacement water flow pressure switch: a diaphragm switch with the barbed sensing port, adjustment wheel, and spade terminals shown in the photos, carrying the Hayward label (marked 11024551).
🚩 PRO TIP: Before replacing the switch, check the sensing port and tube for scale or debris — a blocked port reads as no-flow. If the port is clear and the fault stays with good circulation, the switch itself has failed.
PRODUCT FEATURES & SPECIFICATIONS:
- Brand: Hayward
- MPN: HPX2181
- UPC: 610377807098
- Type: Water Flow Pressure Switch
- Fits: Hayward HeatPro heat pumps using the HPX2181 switch
- Connections: Barbed water sensing port, spade electrical terminals (as shown)
- Label cross-reference: 11024551 (marked on the part)
- Weight: 0.1 lb
FREQUENTLY ASKED QUESTIONS:
- What symptom does a bad switch cause? The heat pump displays a flow error or simply will not start heating even with the filter pump running and good circulation.
- Why does the heater need this switch? It is a safety interlock: the heat pump only fires after the switch proves water flow, protecting the unit from running dry.
- Is it adjustable? The switch has the factory adjustment wheel shown in the photos; most replacements work at the factory setting — match your old switch before changing it.
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