Reefer Return Connector 20-25 mm — Sump Pump Fitting R42222 - Red Sea

The Red Sea R42222 return connector is the genuine fitting that joins the sump return pump to the riser plumbing on larger REEFER systems. 20-25 mm diameter.

Compatibility

Built for the REEFER 450, REEFER XL 425 and REEFER XL 525. On smaller tanks — REEFER Nano, 170, XL 200, 250, 350 and MAX E — you want the 16 mm connector R42221 instead, in G1 or G2 depending on your tank's generation.

When it gets replaced

This is the part you go looking for when a return fitting weeps despite being properly tightened, when a thread got over-torqued during a teardown, or when you're converting the riser to rigid plumbing and starting from the original fitting. On a large tank, a leak here turns into litres on the cabinet floor fast.

What Red Sea publishes

Red Sea does not give its plumbing spare parts a dedicated product page and publishes no detailed data sheet for this fitting. The compatibility above comes from its official distribution network's documentation. If you see a precise dimension, a material or a working pressure quoted for this part elsewhere, it does not come from the manufacturer. Write to us with your exact model and your plan — we'll check with Red Sea rather than guess.

Complementary products

While the sump plumbing is apart, change the R42187 O-ring set — that's the moment it costs you no extra time. And if the cabinet on an XL 425 or 525 is crowded, the Slide-out Control Panel 60 brings all the equipment out at once.

Frequently asked questions

Which connector fits my REEFER?

REEFER 450, XL 425 and XL 525 take this 20-25 mm fitting (R42222). REEFER Nano, 170, XL 200, 250, 350 and the MAX E range take the 16 mm (R42221). When in doubt, write to us with the exact name printed on your tank.

Why "20-25 mm"?

That's Red Sea's official designation for the part. The manufacturer doesn't publish its detailed dimensions — any more precise figure you see elsewhere doesn't come from them.

Can rigid plumbing be connected to it?

Plenty of reefkeepers start from this fitting when converting the riser to rigid pipe. Red Sea publishes no official procedure for that modification — write to us before buying your fittings.

Why buy from ReefSolution

Aquarium ReefSolution is an authorized Red Sea dealer in Laval. Secure delivery across Canada. Free shipping available depending on order amount.