Hi! I need to replace the Whale Evenflow EF0615 low pressure on board water pump in a 1991 Casteleton Caravan. The pump links to a Carver Cascade GE 2 water heater that " must have a pumped cold water input pressure not exceeding 20 p.s.i. (1.4 bar). A pressure of approximately 10 p.s.i. (0.7 bar) is recommended."
The Shurflo Trail 7 20 p.s.i. model seems to be the best replacement but the 1.6 bar pressure still seems a little high for the heater. My question is can the pressure on the Shurflo be adjusted? Would the Fiamma 20 psi pump be a better bet? Any help please?
I think any water pump designed for a caravan will be okay. The one with the higher flow rate will be better especially if you have a shower which is required for a good water flow. When they advise not to have a water pressure exceeding 20 psi. I think they may be referring to connecting directly up to a water mains which some people now do for convenience.
Some pumps designed for caravans and boats do have a higher pressure. I had one on my boat that supplied water at 45 psi. With a half-inch bore hose fitted directly to it, it would send out a jet of water over 20 feet!
Quote: Originally posted by trog100 on 23/11/2018
that would be a bilge pump i would guess.. mine would do the same..
caravan pumps are different kettle of fish.. cheap motors embedded in a plastic housing.. made to look fancier than they really are..
trog
No it wasn't a bilge pump, my bilge pumps had a much larger bore. The 45 psi pump was my fresh water pump, feeding the taps in the galley and toilet/shower compartment. When fitted in place the water came out of the taps with the same sort of force as the mains water at home.
Quote: Originally posted by trog100 on 23/11/2018
that would be a bilge pump i would guess.. mine would do the same..
caravan pumps are different kettle of fish.. cheap motors embedded in a plastic housing.. made to look fancier than they really are..
trog
No it wasn't a bilge pump, my bilge pumps had a much larger bore. The 45 psi pump was my fresh water pump, feeding the taps in the galley and toilet/shower compartment. When fitted in place the water came out of the taps with the same sort of force as the mains water at home.
My caravan uses a small submersible pump which probably has no more than 4 or 5 psi I would guess.
This is not correct. The pressure maximum is due to the units having pressure release valves. If you have a too powerful pump it will just empty the system and make the water system not work.
You need to find the lower pressure water pumps. They are quite hard to get hold of. Also a pressure switch inline with a more powerful pump may also work.
I have the Carver cascade mk2 in my caravan, and I use a submersible pump in a water container outside and that seems to work fine. Not sure what the difference is between the mk1 & mk2, but I don't think there's much. I presume you have an inboard tank?
Quote: Originally posted by Colin21 on 24/11/2020
I have the Carver cascade mk2 in my caravan, and I use a submersible pump in a water container outside and that seems to work fine. Not sure what the difference is between the mk1 & mk2, but I don't think there's much. I presume you have an inboard tank?
The only difference I'm aware of between the Carver Cascade mk1 & mk2 is that the mk1 was gas operated only and the mk2 could be operated by either gas or mains electric which was indicated by the stamped letters on the heater (GE).
Quote: Originally posted by Colin21 on 24/11/2020
I have the Carver cascade mk2 in my caravan, and I use a submersible pump in a water container outside and that seems to work fine. Not sure what the difference is between the mk1 & mk2, but I don't think there's much. I presume you have an inboard tank?
The only difference I'm aware of between the Carver Cascade mk1 & mk2 is that the mk1 was gas operated only and the mk2 could be operated by either gas or mains electric which was indicated by the stamped letters on the heater (GE).
I didn't think there was much difference. Mine is a mk2, but is still just gas operated. I think the GE ones were a bit later.
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Topic: Low Pressure Pump
via mobile 24/11/2020 at 3:57pm
