Hot water system

[Pjj]

Is the header tank another name for the coolant tank?

Yes

 

[Mr B]

Yes

So do these systems have a pressure relief valve or does the coolant/water just expand in the header tank as it heats up?

 

[Pjj]

So do these systems have a pressure relief valve or does the coolant/water just expand in the header tank as it heats up?

The cap has a valve in it that acts as a pressure relief valve I found it didn’t work very well so drilled a hole in the cap and put a bit of hose up in the air from it

 

[Mr B]

The cap has a valve in it that acts as a pressure relief valve I found it didn’t work very well so drilled a hole in the cap and put a bit of hose up in the air from it

Thanks for the info. A quick easy fix.
I'm trying to get my head around how these hot water diesel systems work.

 

[Limbo_117]

Is the header tank another name for the coolant tank?

Yes. Sorry, using plumbing terminology there!

 

[spruce]

Thanks for explaining all that @P4dstar it is really helpful.

So Pure Freedom are still at the high standard they used to be? That's good to know, as before WCW touched them, they would have been my immediate first choice for the hot water system

As it's the usual case, you need to check with the supplier you choose just exactly what they supply.
These days there are a couple of other suppliers who have opted for NOT fitting thermo mixing valves onto their heat exchangers. Rather they use the inbuilt Webasto electronics to increase or decrease boiler heat output as Ionics do. They call it summer and winter settings.

As spares, these mixer valves cost £130 each +vat, so removing them is a manufacturing cost saving.

We have an old Streamline Heatwave that includes mixer valves on both heat exchangers. On full burn the hot water leaving the heater to my pole is around 57 degrees C and around 50 degrees C on my son's pole.

Believe it or not, the hose reel my son uses has minibore fitted and the hose on the reel I use has microbore fitted. The water that comes out of his brush head is warmer than mine. His hose seems to retain heat when lying along the ground better than mine hose with a smaller bore does.

 

[Limbo_117]

I use grippatank hydroheat hose 6mm id.
When water is cold it's a horrible hose, very stiff and twists up.
Can't see it lasting too long either, a year's worth of use and has multiple scars revealing the inner, reinforcing fibres.

Would be interested to hear what hoses others use with hot water

 

[Pjj]

I use grippatank hydroheat hose 6mm id.
When water is cold it's a horrible hose, very stiff and twists up.
Can't see it lasting too long either, a year's worth of use and has multiple scars revealing the inner, reinforcing fibres.

Would be interested to hear what hoses others use with hot water

We have used that hose I liked it but it was so heavy found it lasted well