Water supply to outhouse

[Tex_1]

Hi, im after some advice on how to supply water to a washing machine in our out house. There is a outside tap near by can I T off that or do I need to come off the mains supply with mdpe and use a stopcock where it enters the outhouse etc.
Any help is appreciated

 

[Darren Jackson]

Yes you can tee off the garden tap pipe. Make sure the pipes are well insulated though with a good quality thick water proof insulation not that cheap thin grey stuff from DIY outlets.

 

[Tex_1]

Can I bury the pipes as it would be a shorter route to cut across a pathway at the side of the house rather than going all the way around the walls?
Thanks

 

[Gasmk1]

I came off my outside tap and installed the 15mm plastic inside a 42mm waste with the 15 mm insulated in the 42 mm and had no problems

 

[Tex_1]

I came off my outside tap and installed the 15mm plastic inside a 42mm waste with the 15 mm insulated in the 42 mm and had no problems

Did you just use the normal grey pipe lagging to insulate the 15mm pipe?

 

[Gasmk1]

The thicker one it just fitted into the 42mm but it is also in quite a sheltered part of the property.

 

[Tex_1]

The thicker one it just fitted into the 42mm but it is also in quite a sheltered part of the property.

 

[Tex_1]

Thanks for that, most appreciated

 

[Best]

The grey insulation is good, but not suitable for outside as UV rays will damage it.
If you have it ducted, it would be fine.
I would say the professional way is to have a new pipe ducted underground from your house, but often difficult.

 

[jtsplumbing]

Can I bury the pipes as it would be a shorter route to cut across a pathway at the side of the house rather than going all the way around the walls?
Thanks

in that case connect near your outside tap and run extension underground in blue poly,

 

[Tex_1]

in that case connect near your outside tap and run extension underground in blue poly,

Does it have to be the 20mm mdpe or can I use 15mm or 22mm plastic like hep or polyplumb?

 

[jtsplumbing]

Does it have to be the 20mm mdpe or can I use 15mm or 22mm plastic like hep or polyplumb?

Use the blue its stronger and made for underground use only thing is the size of coil think smallest is 25 mts but cheep.

 

[Riley]

Dare I play devils advocate and ask where the waste of the washing machine is running to

 

[Tex_1]

Use the blue its stronger and made for underground use only thing is the size of coil think smallest is 25 mts but cheep.

Yeah ok I will do, thanks again for your help

 

[Tex_1]

Dare I play devils advocate and ask where the waste of the washing machine is running to

Ive put a bottle gully in just outside of the outhouse connected to the main drain running to the manhole

 

[Riley]

Lovely. Great work.

 

[Tex_1]

Lovely. Great work.

Thanks very much, cant wait to tell the wife lol

 

[Darren Jackson]

Can I bury the pipes as it would be a shorter route to cut across a pathway at the side of the house rather than going all the way around the walls?
Thanks

In That case I would be using 20mm MDPE blue pipe, it is less than £30 for a 25m coil. And no less than 750mm below ground level to avoid freezing!

 

[Tex_1]

In That case I would be using 20mm MDPE blue pipe, it is less than £30 for a 25m coil. And no less than 750mm below ground level to avoid freezing!

Could I possibly insulate this with a good pipe lagging so I dont have to dig so deep?

 

[townfanjon]

Ive put a bottle gully in just outside of the outhouse connected to the main drain running to the manhole

View attachment 32731

Please take this as constructive criticism, your 110 pipe should not be straight on top of the soil / clay , it should be on compacted gravel . But tell the missis lol .

 

[Riley]

Would recommend you didn’t it protects from weight of traffic above too

 

[Tex_1]

Theres 10mm underneath and so far up the sides but I ran out so used 20mm for the rest

 

[Tex_1]

 

[townfanjon]

View attachment 32738

No before the pipe was laid lol .
But honestly is ok , most builders I know would nt bother

 

[Tex_1]

No before the pipe was laid lol .
But honestly is ok , most builders I know would nt bother

Whats your view on the water supply pipe being insulated and buried, can I get away with not digging 750mm if I put a decent lagging round the blue mdpe?

 

[townfanjon]

Whats your view on the water supply pipe being insulated and buried, can I get away with not digging 750mm if I put a decent lagging round the blue mdpe?

I haven't read all comments but yep 750mm is the standard , I am pretty sure with some appropriate insulation and ducting you could reduce it .

 

[Riley]

But as I said above keep in mind that it’s not just freezing risk but also traffic weight above

 

[AWheating]

Just tee into your water main if near by. Use barrier pipe if ground is contaminated.

 

[Darren Jackson]

Could I possibly insulate this with a good pipe lagging so I dont have to dig so deep?

I suppose if you get it as deep as you can, well lagged and run inside a 110mm ducting it may be ok. But really should be below the frost line hence the regulatory 750mm.

 

[ShaunCorbs]

As deep as you can go but I've seen old lead ones just under a foot down and they haven't frozen

 

[Best]

About 2 feet down minimum will be reasonable depth from freezing and avoiding getting easily hit with a spade, but not to regs.
Probably sleeved pipe would help