iam fitting a shower pump for a mixer shower i have run a 22mil pipe from cold tank to pump location next to hot cylinder and 2 pipes one hot one for cold from pump position to shower head what i would like to know is someone mentioned negative head how do i find out what pump i require cheers
shower pump
- Thread starter rossy2
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The type of pump (negative/positive head) depends on the pump location
If your pump will be below the tanks supplying it then it should be positive head if it is above the tank(s) - eg in the loft then you need a negative head pump.
If your pump will be below the tanks supplying it then it should be positive head if it is above the tank(s) - eg in the loft then you need a negative head pump.
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How helpful SoftusSoftus said:Not usually it doesn't.newboy said:
Not necessarily.
Why do think this?
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Did I, dont remember that!
Stan
Stan
That isn't a reason for choosing a positive head pump.rossy2 said:cheers mate for your quick reply my pump will be located below all tanks so positive it is thanks again
What's the vertical distance between the base of the cistern and the shower head?
Hm. That's about 0.08 bar then - not a lot, but you should ask the pump manufacturer what the minimum recommended head is. If you're below that then a negative head pump would be the answer.
However, flow is also a factor, because the flow switch needs to actuate. If you can't be sure about that then you might be better off with a neg pump for this reason alone. The trouble is they're a lot pricier.
However, flow is also a factor, because the flow switch needs to actuate. If you can't be sure about that then you might be better off with a neg pump for this reason alone. The trouble is they're a lot pricier.
RachelG said:
Rachel, I see you've posted this message in another thread, too. Just to let you know that the reason no-one's replied to you is probably because you've 'hijacked' someone else's question. See Rule 20 in the Forum rules. If you're still waiting for a reply, you might want to post your question in a new thread.
To any moderators who might be watching, I'm not trying to do your job. Just trying to be helpful.
Softus said:What?NickStone said:
RachelG asked the same question in this thread, Softus: //www.diynot.com/forums/viewtopic.php?t=93411&highlight=
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