Mailport: December 2011

Pump Plumbing

In the October 2011 article on washdown pumps, it looks like the Groco (www.groco.net) and Shurflo (www.shurflo.com) pumps have threaded fittings made of plastic. I offer a heads up to users that when threading metal hose female ends on to plastic male ends, care must be taken to avoid cross threading the plastic, thereby creating an almost permanent leak. Get a metal fitting with a hose sized male on one end and a female on the other (or put on a custom-sized piece of hose) and carefully screw it on, leaving it permanently in place. This way, you will always have a metal end on which to screw your washdown hose.

Jim Keene
Seal Cove, Maine

You are correct about the risk of cross threading metal to plastic. While the Shurflo’s threads are indeed plastic, the Groco’s are not.

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