How to release water in combi boiler to repair a leakage？

[marshian]

10 hours ago, Nickfromwales said:

Yup. 
 

It’s doing an automatic “purge” of the air. 
 

One of WB more annoying features as when we were all tired and fed up after fitting the bastard things we had to wait for “it” to “decide” when we could go home lol. 
 

Sit and wait. Won’t be long !

 

Hey Zeus that's a bloody annoying feature if you fit WB on a regular basis...............

[marshian]

11 hours ago, LLL said:

Could you please also have a look of the issue? thanks 

@Nickfromwales was far better qualified to answer - sorry for the delay in responding was at a funeral (Brother in Law) all day yesterday.

[LLL]

12 hours ago, marshian said:

@Nickfromwales was far better qualified to answer - sorry for the delay in responding was at a funeral (Brother in Law) all day yesterday.

sorry to hear that. All are fine now. thanks 

[Nickfromwales]

On 11/10/2025 at 21:20, LLL said:

All are fine now. thanks 

Don't forget to wait a few days to be sure, then add the inhibitor chemical (Fernox F1) for protection.

[LLL]

On 12/10/2025 at 23:20, Nickfromwales said:

Don't forget to wait a few days to be sure, then add the inhibitor chemical (Fernox F1) for protection.

Yes, plan to add this weekend, actually I only removed half of the water from the system since the group floor water was locked inside the radiator, do I still need the to be added? Since before the leaking has probably have all water replaced by the fresh water 

[marshian]

2 hours ago, LLL said:

Yes, plan to add this weekend, actually I only removed half of the water from the system since the group floor water was locked inside the radiator, do I still need the to be added? Since before the leaking has probably have all water replaced by the fresh water 

Absolutely yes add inhibitor - without it (in the absence of properly conditioned water which on a sealed system is the alternative) you can quickly get corrosion in the system - bad for rads, pump and boiler