Hi there quick question about water supply

5
Posted 5th Jul 2020
Below ground level but inside the property,what depth is a good level too bury the pipe as I can't find any guidance it's just for outside minimum 750mm. Any ideas. also how wide should i dig the trench and what's best insulation type too use and what too cover it with is it the same as
Community Updates
Ask
5 Comments
I'm just your average Joe, but I think that could be a bad idea, as a leak could go undetected and eventually cause the ground to get so saturated, it'd cause subsidence, could you use a specialised skirting board to hide?
Blue MDPE pipe is used to supply mains water to homes and properties throughout the UK. When laying MDPE water supply pipe, it should be laid at a minimum of 750mm and a maximum of 1350mm below finished ground level.

When water supply pipe is to be laid near to other utilities supplies such as gas or electricity, it should be a minimum of 350mm away.

When it comes to digging the trench itself, aside from digging it to the correct depth, it should also be cut to a minimum width of 250mm plus the external diameter of the pipe itself.

Once the trench itself has been cut there are also guideline that need to be followed in terms of the bed preparation before laying any pipe.

As with other utility supplies, the bed of the trench should be level, flat and smooth and free of any rock, stone or similar hard, jagged objects. If this is the case, then it may be possible to lay your pipe directly on the base.

If this is not the case, then the trench will need to be excavated a further minimum of a 100mm and a bed of sharp sand laid for the pipe to rest on.

Once the pipe is in place in the trench it is then backfilled, firstly by a 100mm layer of sand to help identify the presence of the pipe and then clean soil.

To ensure the pipe is held firmly in place, the soil is then compacted every 300mm.

As is required of other supply pipes, marking tape is laid over the length of the pipe run at a minimum of 300mm above the pipe.

One final point to mention is that where a water supply pipe is to run beneath a structure, it needs to be run through sealed ducting.
fearghalg05/07/2020 20:14

Blue MDPE pipe is used to supply mains water to homes and properties …Blue MDPE pipe is used to supply mains water to homes and properties throughout the UK. When laying MDPE water supply pipe, it should be laid at a minimum of 750mm and a maximum of 1350mm below finished ground level.When water supply pipe is to be laid near to other utilities supplies such as gas or electricity, it should be a minimum of 350mm away.When it comes to digging the trench itself, aside from digging it to the correct depth, it should also be cut to a minimum width of 250mm plus the external diameter of the pipe itself.Once the trench itself has been cut there are also guideline that need to be followed in terms of the bed preparation before laying any pipe.As with other utility supplies, the bed of the trench should be level, flat and smooth and free of any rock, stone or similar hard, jagged objects. If this is the case, then it may be possible to lay your pipe directly on the base.If this is not the case, then the trench will need to be excavated a further minimum of a 100mm and a bed of sharp sand laid for the pipe to rest on.Once the pipe is in place in the trench it is then backfilled, firstly by a 100mm layer of sand to help identify the presence of the pipe and then clean soil.To ensure the pipe is held firmly in place, the soil is then compacted every 300mm.As is required of other supply pipes, marking tape is laid over the length of the pipe run at a minimum of 300mm above the pipe.One final point to mention is that where a water supply pipe is to run beneath a structure, it needs to be run through sealed ducting.


Thanks, but for inside the property is it necessary too go too 750mm depth it won't freeze. And there aren't any utilities the route I am taking , they are outside and I rather avoid crossing there paths.

The electric Cable has accidentally been hit as it was laid about 25cm from ground level and 8 am already waiting on a bill from the electric board for that.
MynameisM05/07/2020 21:20

Thanks, but for inside the property is it necessary too go too 750mm depth …Thanks, but for inside the property is it necessary too go too 750mm depth it won't freeze. And there aren't any utilities the route I am taking , they are outside and I rather avoid crossing there paths. The electric Cable has accidentally been hit as it was laid about 25cm from ground level and 8 am already waiting on a bill from the electric board for that.


That can be pricey - usually a £1500 bill, so be prepared.
Are you re routing the mains or just spurring off it for a feed?

You can put it in as high or low as you like. It’s your house and your responsibility. Likewise youre the one who will pay if you get a leak or burst pipe. To protect the pipe I’d defo be ducting it and bedding it in sand.
Inside the house there isnt any requirements as to the depth of your water mains pipe. When we had our house recently done up, our new mdpe pipe was laid in 50-80mm trench inside the house, Just below our downstairs tiles. I know exactly where the trenches are so if in the case of any future problems, we know where it would/could be.

Just make sure you dont lay them anywhere near any hot water pipes.

Side note, we changed our supply line from our main outside stopcock to increase flow rate for our megaflo. This was located in the middle of our brick driveway. To prevent too much damage, and reduce any reinstatement and unnecessary trench digging, i contacted a company which uses a pneumatic bore to make a hole under the ground to push the new mdpe pipe through. I paid just under £500 for this and they also laid the pipe inside the house. They only had to dig 2x 500mm by 500mm holes to push the pipe though and bring out from. The builders used an angle grinder and a small pneumatic hammer breaker to create the path for the pipe to lay in.
Post a comment
Avatar
@
    Text