Is a revision shaft necessary for us?

Hi,

we will be laying the rainwater and wastewater pipes outside on Saturday.

Attached are the positions showing approximately how the pipes will run


My main concern is the wastewater, whether I should install an inspection chamber somewhere there. The pipe length from the bathroom is about 14m and from the utility room about 10m. If a chamber is needed, it would rather be near the bathroom. The experts said that for this length it can be done without, but it is not strictly necessary.

Checking with the neighbors is not very helpful. So far only two have started. One has two chambers, as his pipe lengths are significantly longer, and the other is doing it with me on Saturday and is skipping the chamber at a similar pipe length because he says that in case of problems one can access the transfer chamber since it is not that far away. That is not really representative yet.

What do you think in my case? Necessary? Not necessary but advisable? Not needed because the transfer chamber is nearby?

Hello

I have about 8 meters from the house to the sewage connection. Halfway along the route I have an inspection shaft. 2 120cm concrete sewage pipes. A conical shaft on top and closed with a concrete cover. It was a day of digging (the excavations for the house were already done long ago, so I worked with a shovel and spade) but with clogged HT pipes I always get close to the cause.

Steven

I would do it too or rather have done it too. Pipe lengths similar! In DN400 plastic it is completely sufficient in my opinion.

Exactly. Do that. Having is better than needing.

Oki doke, will be ordered later. DN400 plastic is by the way exactly what I had offered it will be placed right in front of the bathroom so that I can take the walk-in one. Driveable costs a chunk of money more.

...and see what the development plan stipulates for drainage.

For us, the mandatory requirement is: 2x inspection chambers and a cistern. Totally crazy, one inspection chamber could have been saved because of the cistern. It's just as well that they were not as expensive in individual contracts as with the general contractor.