This is no combi this is 2 systems with good pressure on both all taps. 20 ltrs of constant hot water. A relay could connect both pumps 10 amps each, but I use fuses at this time. As I still building van. It will have upto 50ltr hot from solar afternoon s electric.
I used something like this on the Murky build due to it's frost tolerance.
Shop around, you may find a better price.
Will do, I need to shop around for the best price on truma combi 4e anyway.
Check what pressure your Truma will take. Just remember with a small amount of water onboard it might be better if it just trickles from the taps.
A Truma combi4 has a max working pressure of 2.8bar = 40 psi. So I would personally go for the 30psi as there is little difference in price if you shop around. As for the flow of water from a small storage tank, you can open the taps to a dribble or full flow it's up to you, but at least if you want full blast it's there if you open the tap fully.
Phil
Hi Nabsim, the reason for an expansion/accumulater is to stop pulsing of the water flow caused by the water pump using the accumulater, and to help with thermal expansion in the hot water system by using an expansion tank. In general the use of an expansion tank in a motorhome is not necessary. So depending on what type of pump you use depends on whether you will require an accumulator or not, if your pump is of the diaphragm type such as like the old electric pumps they used on British cars to supply fuel to the carbs in the 50-80s then you would probably like to use an accumulator to steady the flow but if you have a high pressure rotary type pump which uses multiple diaphragms the flow of water is smoothed out to the point that an accumulator is unnecessary. Phil
But you can fit a tap.
You could if you wanted, could also fit some sort of thermostatic bypass but no need
