Author Topic: Looking for small water pump plans.  (Read 1794 times)

Offline crueby

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  • Rochester NY
Re: Looking for small water pump plans.
« Reply #15 on: February 05, 2019, 08:45:51 PM »
Hi Gas_mantle

This might be of some use to you, its a hand pump I built a while back and has been very reliable. I have recently used it to hydraulic test my loco boiler

http://www.modelenginemaker.com/index.php/topic,336.msg2089.html#msg2089

Cheers

Rich
Rich, thats a slick setup with the o-rings, had not seen that before, seems like it should hold better than the steel ball method on seats that are not perfect. Interesting!
Chris

Offline Firebird

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Re: Looking for small water pump plans.
« Reply #16 on: February 05, 2019, 09:53:05 PM »
Hi

Yes its a lot easier to get the O rings to seal than balls. It will pump a 100psi no problem and hold without dropping pressure

Cheers

Rich

Offline mnay

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Re: Looking for small water pump plans.
« Reply #17 on: February 19, 2019, 07:34:11 PM »
the o rings are a great idea!!!!!
I have trouble with the balls sealing, especially after they sit unused for a month or two.
Mike