Quick Couplers/ O-Rings
This category includes pressure-washer quick couplers (sockets and plugs) and the O-rings that seal them. These parts make fast, reliable connections between hoses, pumps, guns, wands, and accessories.
For best results, match your parts by size and thread, choose a material suited to your water and chemicals, and keep spare O-rings on hand to stop leaks fast.
Featured Categories
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Sale!
Quick Connect Female Plug 1/2
Original price was: $8.47.$7.20Current price is: $7.20. -
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O-Ring Pick
$5.47 -
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Quick Couplers/ O-Rings FAQ's
Do quick couplers reduce pressure or flow?
All fittings add some restriction. Use the smallest number of adapters and pick a coupler size that supports your machines GPM (e.g., 3/822 for many hoses; 1/222 on higher-flow rigs). Keep components clean to minimize losses.
Why is my coupler leaking after I release the trigger?
The O-ring may be flattened, cut, or missing, or debris may be trapped in the socket. Replace the O-ring, clean the socket, and confirm youre using the correct plug size and thread type.
Can I mix brass sockets with stainless plugs?
Yes, but be mindful of galvanic corrosion in wet or salty environments. If exposure is frequent, consider matching stainless-to-stainless components.
Which O-ring is best for hot water or oily environments?
FKM is often selected for higher temperatures and better resistance to oils. Verify the couplers overall pressure and temperature ratings against your washer before use.
Which O-ring material should I use around bleach or alkaline cleaners?
EPDM is commonly chosen around sodium hypochlorite and other strong alkalis. Avoid NBR and FKM in these mixes. Always confirm compatibility for your exact chemical strength and temperature.
Whats the difference between NPT and BSP threads?
NPT is a 606 tapered American pipe thread that seals with thread interference and sealant. BSP comes in parallel (BSPP) and tapered (BSPT) forms with a 556 profile. They are not interchangeablealways match the thread family your equipment uses.
How do I tell if my quick coupler is 1/422, 3/822, or 1/222?
Measure the plugs outside diameter (or the sockets mouth) with calipers and compare to the nominal size used in your system. Also check the threaded end for its size and thread family (NPT or BSP). If youre unsure, bring a known mating part to match.
