Flojet 02090-121 Pressure Switch Kit, 80 PSI
The Flojet 02090-121 is the genuine 80 PSI pressure switch kit. Eighty PSI sits between ordinary fresh water service and the genuinely high-pressure end of the range, and it suits systems that need real pressure at the outlet without going to industrial levels.
Typical reasons to run at this pressure are practical rather than exotic. A long plumbing run loses pressure over its length, so a system feeding outlets a good distance from the pump may need to start higher to arrive at something useful. Spray nozzles and some filtration equipment have a minimum inlet pressure below which they simply do not work properly. And systems with several outlets in simultaneous use need enough head of pressure that opening a second tap does not collapse the first.
As with any higher-pressure setting, the switch is only half the question. The pump has to be able to reach 80 PSI, or it will run continuously without ever cutting out, and the plumbing, fittings and downstream components all have to be rated to hold it. Check those before ordering rather than after, because at this pressure a marginal joint does not weep quietly — it lets go.
Key Features
- Genuine Flojet (Xylem) service part — correct switch and mounting for the pump
- 80 PSI setting for systems needing real pressure at the outlet
- Suits long plumbing runs where pressure is lost over distance
- Meets the minimum inlet pressure required by spray and filtration equipment
- Supplied as a kit rather than as separate components
Applications
- Flojet systems specifying an 80 PSI switch
- Installations with long runs between the pump and the outlets
- Spray nozzles and filtration equipment with a minimum inlet pressure
- Systems with several outlets in simultaneous use
- Marine, dockside and mobile pressurised water systems
Specifications
- Brand: Flojet (Xylem)
- Manufacturer Part Number: 02090-121
- Part Type: Pressure switch kit
- Pressure Setting: 80 PSI
- Function: Automatic pump start and stop on demand
- Condition: New
Frequently Asked Questions
Q: How much pressure does a long run actually lose?
It depends on bore, length and the number of fittings, but it is often more than people expect. A small-bore run with several elbows can lose a substantial fraction of the pump’s output pressure before the water reaches the tap.
Q: Is it better to raise the pressure or increase the pipe size?
Increasing the bore is usually the better engineering answer, because it reduces the loss rather than compensating for it, and it does not put the whole system under extra stress.
Q: Will a higher-pressure switch make the pump run longer each cycle?
Yes. It has further to go before cutting out, so each cycle is longer and the motor works harder. An accumulator helps by reducing how often that happens.
Q: Can I fit this to a standard fresh water system?
Only if everything in it is rated for 80 PSI. Most domestic-style plumbing is built around a much lower figure, and raising the pressure tends to find whichever joint was least well made.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct part before you order.
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