Jabsco Replacement Pressure Switch for Par-Max Water Pumps (18916-0040)
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Jabsco Replacement Pressure Switch for Par-Max Water Pumps
A genuine Jabsco replacement pressure switch for Par-Max freshwater pump systems. The pressure switch is the component that controls automatic pump operation — activating the pump when system pressure drops as a tap is opened, and shutting it off when pressure is restored. When the switch fails, the pump either runs continuously or won’t activate at all. Replacing the switch is a straightforward repair that restores proper automatic operation without replacing the entire pump.
Key Features
- Genuine Jabsco replacement pressure switch
- Restores automatic on-demand pump operation
- Activates pump when system pressure drops, shuts off when pressure is restored
- Standalone switch replacement — confirm compatibility with your specific Jabsco pump model before ordering
Compatible Applications
- Jabsco Par-Max water system pumps requiring pressure switch replacement
- Par-Max pump systems where the pump runs continuously or fails to activate
- Jabsco pump installations requiring part number 18916-0040
Parts Desk Insights
A failed pressure switch is one of the most common Jabsco pump service issues — symptoms include the pump running non-stop even when no tap is open, or the pump not activating when a tap is turned on. This is a standalone switch replacement; if your pump uses a switch kit with additional hardware, the Jabsco Par-Max Pressure Switch Kit (37121-0010) may be the more complete solution. Confirm the correct part number for your specific pump model before ordering — Jabsco Par-Max pumps in the catalog include the Par-Max 1 GPM, Par-Max 2 GPM, Par-Max 3 GPM, and the Heavy Duty series: Par-Max HD 3 GPM, Par-Max HD 4 GPM, Par-Max HD 5 GPM, and Par-Max HD 6 GPM.
Part Number: 18916-0040 | Type: Replacement Pressure Switch | Fits: Compatible Jabsco Par-Max Pump Models
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.