Macerator pipe. 21.5mm

[roons111]

About 7 years ago had a downstairs bathroom put in, with a macerator. Other than a few repairs its been ok. Just recently been overflowing and upon investigation its the obvious, blocked pipe (where there are two 45 angles over a short space).

Researching and it looks like they have used 21.5mm rather than 22mm pressurised pipe. Replacing the 21.5mm seems like a big job as its boxed and plastered.

How bad is it to replace (about a 200mm) with the 22mm.

I think i know the answer but dont really have the funds to do this properly so if i can delay a year or so i would like to.

 

[just pumps]

The existing pipe is fine.

 

[endecotp]

it looks like they have used 21.5mm rather than 22mm pressurised pipe.

Plastic or copper?

If plastic, what sort of fittings? Push fit?

 

[mattylad]

Did someone put wipes down it?
Needs a little reminder stuck to the cistern: "If it's not been through you, it's not going through me".

0.5mm is not going to make a jot of difference.
The 45 angles might though.

Can you get at the macerator end of it?
You (expect lots of mucky water here) be able to disconnect and shove a flexible rod up - like a long sprung net curtain rail, in order to dislodge the offending blockage.
One of the jobs plumbers just love to do except they prefer to use Napalm on it