How to install radiator thermostatic and lock shield valves correctly.

Derek in this video shows us the correct way to install thermostatic and lock shield radiator valves from start to finish.

[@user-ju4fp6ls3s]

Brilliant video again...

[@bentzionroyde4786]

Thanks Derek great video 👍

[@amcluesent]

I changed a rad and draining and repressurising caused the Combi's expansion vessel seam to crack.

[@BABYCHAOS26]

Most TRVs these days are bidirectional, it’s usually when you’re fitting column rads you have to know which side is flow / return.

[@tomkatgastraining]

Correct but if they are not then you need to know the flow it’s best practice

[@dazl7954]

also some cheap budget TRV bidirectional valves can be noisy, if fitted against the flow of water.

[@BABYCHAOS26]

@@dazl7954 I’d never use cheap gear, you nearly always regret it.

[@dazl7954]

@@BABYCHAOS26 agree, always worth paying the bit extra :)

[@jayseabie215]

Drayton TRV 4's are bi-directional, as are most modern TRV's, doesn't matter if they are on the flow or return.

[@tomkatgastraining]

Not true or good practice

[@SuperWayneyb]

🤘😎🤘

[@julianwebb8712]

Not sure why you drained the entire system when you could have isolated all the rads at both ends to retain the deoxygenated water aswell as saving time on bleeding……a fresh refill also brings with it a whole new lot of minerals to scale up the heat exchanger 😊

[@tomkatgastraining]

Only in some parts of the country also isolating rad valves could cause problems ie leaking or snapping or causing air locks.