expansion valve discharge

[westyvip]

I have fitted an unvented solar cylinder and the posistion of the cold supply pipework is low level...ideal to connect straight into cylinder inlet. however this would obviously mean that i will not be able to tee the expansion discharge into the D1 above the tundish. Is it possible to fit a seperate discharge pipe for the expansion valve or could i tee into the d2 below tundish? if installing a seperate discharge...do the d1 and d2 regs apply? eg. would i still need tunidish withing 600mm and 300mm of straight pipe below? i know i could just take the cold up, then back down but i need as much wall space as pos for expansion vessels and solar pump station!

 

[kirkgas]

you can in effect do anything you want, as we all see from others work every day, but to do it properly the connection should be above the tundish so that it is visible and in the event of the d2 being blocked the water will escape out of the tundish (flooding the floor) but wont build up pressure in the system, if you fit a seperate discharge then it needs to fully comply with d1/d2

 

[westyvip]

yep, as i thought, guess it wont hurt to bring the cold up and give myself a bit more room to work with!