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Post by Deleted on Jan 27, 2019 22:08:28 GMT
Wonder if you can all do me a favour and check your clean water pumps and let me know what psi they are?
reason being I have two fitted inline, each 20 psi, have just moved them to a new location and started to see a couple drips, as there are two pumps, two shit off taps and a pressure thing tank I would like to lose one and lessen the connections but I am unsure if 20psi is strong enough.
i can only guess the boat had two fitted to ensure water would flow if one went down, being an ex hire boat.
thanks
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Post by phil70 on Jan 27, 2019 22:42:53 GMT
Prob right about the hire boat thing my pump rated at 30psi but cranked back to 25psi, plenty pressure on 60ft boat with pump in the bows, galley midships and shower in the stern
I'd guess 20psi would be plenty
Assume your pumps work OK as they are, running 2 pumps at 20psi still only gives you 20psi.
Phil
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Post by Gone on Jan 27, 2019 22:48:47 GMT
Pumps have 2 parameters you are interested in, these being operating pressure - needed to force water along the pipes, and the volume of water the pump can shift per min. So a high pressure, low volume pump will give a poor shower as will a low pressure, high volume pump. So just static cut out pressure will not tell you much.
Exampl - a parmax 2.9 pump will give 11litres per min with a cut off pressure of 25psi where as a parmax 4 pump also cuts off at 25psi but will shift 16litres per min. So both have the same cut off pressure, but the bigger pump will give 45% more water.
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Post by ched on Jan 27, 2019 22:53:14 GMT
Hiya Froggy,
Ours is 25psi and works just fine on our 57ft nb.
I think it's more to do with flowrate (which does seem to be relative to the psi rating) whether 'pressure' at taps/shower heads are sufficient.
I can only assume the two pump set-up as you say is due to ex hire boat (i.e. to compensate if two people are showering or one doing the washing up).
Hope this helps - I'm not a marine engineer so I could have just told you a complete load of bullaka
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Post by JohnV on Jan 27, 2019 22:59:16 GMT
I have just been and checked mine ..... its 40 psi but if I remember correctly it replaced one of 25 psi (It wasn't replaced with a higher pressure because I needed higher pressure but purely that it was the only one the chandler had in stock for 24 volt.) The shower pressure is now excellent but before it was ok ..... I would suggest your 20 psi will be fine, the only thing that really needs pressure is the shower and lets be honest a lower pressure is going to save water.  (you did know you were joining the soap dodgers association didn't you?)Anyway if you have the pumps already, why don't you alter the system using one of them and if you need more pressure then get a new one, after all it will still work just the taps/shower won't flow as fast |
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Post by Deleted on Jan 28, 2019 7:59:45 GMT
30psi shurflo trail king 12v. 57x12ft barge. Its a pile of shite but does the job adequately.
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Post by Deleted on Jan 28, 2019 10:19:23 GMT
Thanks all, i think i might rebuild the pipework as i have a shed load of push fit stuff, remove one and keep for back up.
its crazy how many connections are there, all was fine till i dropped my drill on it now i have two small leaks.
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Post by Gone on Jan 28, 2019 15:13:54 GMT
Thanks all, i think i might rebuild the pipework as i have a shed load of push fit stuff, remove one and keep for back up. its crazy how many connections are there, all was fine till i dropped my drill on it now i have two small leaks. Look at the positive side, at least the pipes broke the fall of your drill😃 |
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(you did know you were joining the soap dodgers association didn't you?)