this is what is called as a combined drain.
it can just be one of those things but if it keeps happening then that says that the public sewer is blocked which is down to the local authorities.
if you know that it is their problem then dont let them beat you they are lazy sods they will...
i have heard this one so many times.
it doesnt matter how big or small your drain is anything can block even a 2 meter diameter sewer now unblock that and have the bill for it.
the most easiest answer is that there is pieces of broken pipe in it and i will say it now they can be bastards...
this suggests that there is a blockage in your system?
but then you say there is a dergo valve, this is called a anti air lock valve that stops foul odours entering your home ( a good idea really)
normally if you take the cap off it does clear because air can clear blockages.
if there...
just because it keeps blocking it doesnt mean that the waste pipe cant take it.
it means that there is a problem within the system, such as roots or an ignorant/stubborn blockage.
you need to go somewhere like travis perkins that stock these sort of manhole covers, as sealed covers are normally used for main roads as they are made to withhold upto 44 tonne .
if travis perkins dont do them you need to goto a drainage supplier.
they normally do them.
if they screws wont budge then soak them in wd40 it sometimes works, they wont budge because the person that put the manhole in didnt grease he screws up and tightend them to tight.
if that doesnt work then you will have to break the manhole.
i suggest that you dont tamper with the row of...
there are several answers to this depending on how you want to go about it.
you could
1) dig down on the underground drainage system and clear it from their (but you might not find the pipe because they dont always flow in straight lines)
2) cut the downpipe before it goes into the...