Kits Parts
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Rebuild kits bundle the parts that fail together on the same schedule — typically water seals, oil seals, o-rings, and sometimes valves — so you don't tear a pump down twice within a few months for parts that were already due. Kits are matched to a specific pump model and plunger diameter, the same way individual seals are.
Kits Buying Guide
When a kit beats buying parts individually
If you're already opening the pump to replace one worn seal, a full kit is usually cheaper per-part than ordering individually and saves a second teardown later when the next seal in the same assembly wears out.
Confirm your exact pump model first
The most common kit-ordering mistake is guessing the plunger diameter instead of confirming it from the pump's data plate or model number — kits are not interchangeable across diameters even within the same brand.
Kits FAQ
Do rebuild kits include installation instructions?
Most kits ship with a parts list matched to the pump model; general installation follows the pump manufacturer's service manual. If you're unsure of a step, it's worth having a shop do the rebuild rather than risk misseating a seal.