G
gungaabayar
Im planning to do some DIY plumbing in my one bedroom flat which has currently S plan open vent CH and HW system (with 5 rads and heat only boiler)
1. Drain off the system
2. replace 2 old rads with new one
3. replace old style bypass valve (lockshield gate valve) with new Auto Bypass Valve
4. refill with inhibitor
I replaced one old rad week ago and refilled the system with X400 cleaner. had no problem to change the rad, but I didnt refill properly cos no water comes to any rad. I must've made something wrong, called a plumber and he back filled, by the way cold feed is not blocked. he said just air lock inside a pipe.
so what I am aware of when draining off and refilling the system this time? Ive read so many times like drain off and refill it.
I just wanna know following things before I start my DIY plumbing next week
how to drain properly (obviosly I will drain all rads , openig all vent point)
a) Do I have to open zone valves manually when Im draining the system? (I didnt when Im draining week ago)
b) in order to stop cold feed to the system do I have to close gate valve of the feed tank with the ball valve open or leave ball valve up position with the gate valve open (means emptying feed tank)?
c) do I need to drain boiler as well and how?
How to refill properly:
d) Do I have to leave all rads' vent OPEN before start refilling?
e) Do I have to leave ZVs open manually during refilling? ( I didnt leave them open during refill week ago)f) Do I have to leave rads drain valve open until water reaches to that point?
so what else Im should be aware of not getting airlock which happened to me last week?
any advice is very helpfull
many thanks
1. Drain off the system
2. replace 2 old rads with new one
3. replace old style bypass valve (lockshield gate valve) with new Auto Bypass Valve
4. refill with inhibitor
I replaced one old rad week ago and refilled the system with X400 cleaner. had no problem to change the rad, but I didnt refill properly cos no water comes to any rad. I must've made something wrong, called a plumber and he back filled, by the way cold feed is not blocked. he said just air lock inside a pipe.
so what I am aware of when draining off and refilling the system this time? Ive read so many times like drain off and refill it.
I just wanna know following things before I start my DIY plumbing next week
how to drain properly (obviosly I will drain all rads , openig all vent point)
a) Do I have to open zone valves manually when Im draining the system? (I didnt when Im draining week ago)
b) in order to stop cold feed to the system do I have to close gate valve of the feed tank with the ball valve open or leave ball valve up position with the gate valve open (means emptying feed tank)?
c) do I need to drain boiler as well and how?
How to refill properly:
d) Do I have to leave all rads' vent OPEN before start refilling?
e) Do I have to leave ZVs open manually during refilling? ( I didnt leave them open during refill week ago)f) Do I have to leave rads drain valve open until water reaches to that point?
so what else Im should be aware of not getting airlock which happened to me last week?
any advice is very helpfull
many thanks
