under pressure (1 Viewer)

[lee52]

hi as you will know I am in the middle of the major rebuild of the ole girl.

just at the first fix stage before all the wall boards go on and the internal are built.

so todays question is about water I dont know what pump to run its going to be a pressured system so what psi do you guys and gals run and litres per min

 

[tonyidle]

Whale (and other) submersible pumps work well on a pressurised system. My experience of the self-priming diaphragm pumps hasn't been good - they are expensive to rebuild / replace as well. Choose a high-output submersible & use an accumulator. If you need even more flow (and I don't know why you would ) it is easy to double up submersibles.

 

[aba]

check if the water heater has a max pressure rating and stay under that.
most are around 1.5 to 2 bar and 8 to 10 litres per minute.
obviously the less flow rate the longer your hot water will last in the dribbling shower

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[lee52]

check if the water heater has a max pressure rating and stay under that.
most are around 1.5 to 2 bar and 8 to 10 litres per minute.
obviously the less flow rate the longer your hot water will last in the dribbling shower

still not 100% on which heater Iam going to use I have the choice of a casade 2 (gas only) or a atwood 6gallon (gas only) dont know any specs about them as far as max pressure etc..

 

[pappajohn]

still not 100% on which heater Iam going to use I have the choice of a casade 2 (gas only) or a atwood 6gallon (gas only) dont know any specs about them as far as max pressure etc..

as the atwood is fitted to american RV's it will be rated at 45psi.
Other restrictions could be taps etc....european taps are generally only rated to around 30psi (2bar)

If i was starting from scratch i would certainly fit an Atwood or Suburban heater.

6 gallons (even US gallons) is obviously far better than 10 litres.

 

[lee52]

as the atwood is fitted to american RV's it will be rated at 45psi.
Other restrictions could be taps etc....european taps are generally only rated to around 30psi (2bar)

If i was starting from scratch i would certainly fit an Atwood or Suburban heater.

6 gallons (even US gallons) is obviously far better than 10 litres.

just had a look at the heaters i have the cascade is rated at 1.5 normal pressure and the atwood the only info i could find is the blow of valve is rated at 125psi so that one will pretty much take anything i throw at it. whats sort of flow rate should i be looking at I dont want a dribbly shower but on the other hand I dont want to empty the tank in 2 seconds flat

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[Gromett]

I went for the Shurflo 30 psi model. Been working fine for 4 years now. I gave up on the submersibles as I found them unreliable and weedy. I had 3 give up on me over a 3 year period.

 

[pappajohn]

this is the pump i use.

Max flow 2.8 gallons/minute
Max pressure 45psi

http://www.shurflo.com/rv-products/rv-pumps/classic-series-water-pumps/shurflo-classic-pump/default.html#tab03