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Flow Switch-Box End-Used on LCD Models

2560-040 Box Connector
3/4" Barb Fittings with Smaller Drain Barb
Comes with Cord and 2 "Box End" Wire Connector
Install into Existing Black Connector Shown (not included)
NOTE: This switch is directional. Match arrow on housing with actual flow of water from the circulation pump.
2002+ Jacuzzi Hot Tub and Sundance Models with Small Circulation Pump
with LCD Topsides
(Box Finger Connectors)

Help Installing New Switch to Old Plugs

Flow Switch Education

Flow Switch vs Pressure Switch: Most use a flow switch. If you have a 24/7 circulation pump you likely have a flow switch. On a few models the #1 Jet pump is 2 speed. On low it does the heating. This design uses a pressure switch. In both cases, the switches are simply on/off switches. They tell the board if enough water is moving pass the heater element. If not, the unit will not turn the heater on and give a flow error. What the board looks for is for the switch to be OPEN when the pump is off. If so, it turns the pump on and now looks at the switch to be closed. If so, the board turns the heater on. IF either situation is not true, the board will not turn on the heater and will give an error message.

Flow Switch: As pictured, its a fairly simple to replace. It IS directional. So make sure the arrows point in the direction of water flow. On most the housing is clear so you can see the switch. It consists of 2 parts; the flap and the post. The post remains stationary and contains the switch. The flap is AWAY from the post when the pump is off and against the post when the pump is on. A clear housing allows you to see if that is true and if not, gives indication to the problem.

Pressure Switch: Most switches are adjustable. Problem is there is a "sweet spot" that the switch must reside in. If the adjustment is pass this sweet spot, you will get errors.

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