8mm Microbore CH system blockages

[Pongo]

I'm currently working on a system that looks to have seriously restricted flow too the point of none. It's been corroding away since it was installed I would imagine. Only 1 service in 9 - 10 yrs its been commisioned and dubious inhibitor levels if at all. The flow restictiction has blown the expansion vessel and burnt out the pump. Once again 8mm microbore. Powerflushing with X800 had no effect.

I'm going to try and locate the manifold (if they even fitted one) and cut it out and inspect the pipes before I move on to other things, like making a quote up for repiping. Customer is unable to accept that the CH pipe on his 9 year old house may need replacing! Customer has tame retired plumber friend on the other end of the phone who has never needed to repipes and has always cleared the blockage :001_9898::smartass:

The worrying thing is that the house is on the same estate as mine and built by the the same "builders"!! (Think I'll be flushing my own system very soon.

Thoughts, suggestions?

:santa3:

 

[Leo21]

Use a foot pump, it fits right on to the 8mm. Take the valve of and give it a pump. Let it go into to a bucket.

 

[Neil K]

You could try disconnecting the manifold completely, get some speedfit plastic pipe and hook up the cold water mains pipe to each stabbing coming out of the ground one by one and blowing out any restrictions the other end, would prove whether completely blocked or not. If all good after that you could make up a bigger bore manifold with larger diameter center tees.

 

[Pongo]

Many thanks guys, I'll give both of these suggestions a go and report back.

 

[Neil K]

Pressure test buckets a good man for blasting out blockages too

 

[Ermintrude]

Doc open . Remove rad tails blow up to 8bar it will move .

 

[jtsplumbing]

Wasting your time trying to power flush micro-bore system, X800, waste of money never liked sentinel products

 

[AWheating]

repipe it.