Mini Pump P71…..thoughts?

Mini Pump P71…..thoughts?

This topic has 4 replies, 5 voices, and was last updated 16 December 2024 at 11:49 by Bazyle.

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16 December 2024 at 06:45 #770473
Blue Heeler
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@blueheeler
have a lot of hours in this P71 pump from eBay, enjoyed every minute of making all the metal parts and woodworking.
Only thing I haven’t done yet is bend and cut the return that will flow the water into the 4″ copper water trough as I’m still pondering a few ideas.
I did toy with the idea of making a ‘shower rose’ but think because it won’t be pressurized it would still just dribble out in one stream.
Anyone got any clever ideas before I cut and bend that brass pipe?
Advert

16 December 2024 at 06:59 #770474
JasonB
Moderator
@jasonb
Make a little bibcock tap rather than just have it come out of a pipe.
16 December 2024 at 07:37 #770477
AStroud
Participant
@astroud
For a reciprocating pump pressure is developed by any restriction in the outlet so if the showerhead holes are small enough the water should squirt. It should be quite easy to lash something up to test before committing your brass pipe.
16 December 2024 at 10:44 #770496
Martin Connelly
Participant
@martinconnelly55370
It has what looks like a pressure accumulator sticking up above the pump. To me the implication is that it is reasonable to have some restriction to flow and the accumulator will smooth the flow through that restriction. I would consider something like a miniature hose pipe nozzle that allows the flow to be a spray or a jet so you can experiment and see what works best.

Martin C
16 December 2024 at 11:49 #770508
Bazyle
Participant
@bazyle
Are you going to run it at shows or just glass case it? If running for the public I suggest having it do something extra to entertain children who a) have no idea what it is anyway, and b) like to see things moving. One possibility is a syphon (gent’s loo flush) as the kids then will wait excitedly to see it operate.
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