Vicdicdoc
I finally got the water system up & running, I fitted J Guest 13(or is it 15mm) from the pump to a 'T' where it reduces to 10mm throughout except for the hot water side from that 'T' to the rear of the van (where the water heater is - 3m) back to 13/15mm J Guest piping, turning on the cold water sink tap or shower tap the pump cuts in & operates perfectly . . turn either tap to hot & the pump cycles on & off with a reduced flow compared to the cold water - I'm wondering if the cycling is due to the larger pipe bore not creating sufficient pump pressure (no leaks anywhere on the system) - What's your opinion causing this ?