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Thread: Auto fill

  1. #1

    Auto fill

    Hiya

    Im planning on putting an autofill on my re-furb pond.

    So I dug a trench down the side of the house ready to lay some MDPE pipe for a supply only to find out I need to go 750mm deep minimum and water regulations blah blah. And then I realised there is the risk to our property foundations if the pipe starts leaking so I'm now going to stay above ground using 15mm barrier and push fit - in black if I can find it as white will look awful

    Anyway - to the question. Im assuming that I wont need the autofill in the winter so can drain the feed to stop it freezing ????

    Thanks

    Wayne



  2. #2
    Senior Member Rank = Jussai Twhitenosugar's Avatar
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    I'm no expert, but I understood a water supply pipe can be laid shallower than 70cm deep, but it has to be insulated, if it is.

    How I got around this, I bought some heavy duty pond hose (not the cheap spirally stuff that goes brittle) that was long enough to go between my shed and my house where, i T'd off the mains supply and then threaded the blue mdpe pipe through it. Then buried it in pea shingle alongside the waste pipe from the pond and then covered the shingle with soil etc...

    I've had no issues with it freezing in winter when temps went sub-zero over the last two years.

    Sent from my Pixel 4a (5G) using Tapatalk
    13,000L fibreglassed raised pond with window

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  4. #3
    Senior Member Rank = Grand Champion davethefish1's Avatar
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    almost no regs at all about laying pipes After they have exited the house via a double check valve hose union bib tap...
    what would you class a hose pipe laid across the garden all winter...?

    tempory site mains are left laying above ground in the mud most times....

    i'd run it in mdpe insulate it and bury it as deep as you can easily manage.
    mine is 20mm mdpe, 20mm thick insulation where it's clipped to the wall, and buried about 10" deep everywhere else.








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    Senior Member Rank = Grand Champion samp09's Avatar
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    How failsafe are the joints? I am in the process of getting the garden ready for a patio but have a join which would be under the patio which I believe is a No-no so was thinking of using a little access cover or something to be able to get to it should I have an issue ever. It will be about 8-10" underground by the time the patio is done but not sure I want to bury it and lay patio on top

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  8. #5
    Senior Member Rank = Grand Champion davethefish1's Avatar
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    Quote Originally Posted by samp09 View Post
    How failsafe are the joints? I am in the process of getting the garden ready for a patio but have a join which would be under the patio which I believe is a No-no so was thinking of using a little access cover or something to be able to get to it should I have an issue ever. It will be about 8-10" underground by the time the patio is done but not sure I want to bury it and lay patio on top
    Its what they are designed to do, get buried...
    Just make sure you do a good joint.

    You can get pushfit mdpe connectors but they can be a right bugger to get off if you connect it wrong...

    Always used philmac fittings, just what i'm used to...

    You could always electro fusion weld it...
    Last edited by davethefish1; 09-05-2022 at 10:32 PM.

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  10. #6
    Senior Member Rank = Grand Champion samp09's Avatar
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    Oh really? I used the JG pushfit pipes and have checked they are not leaking. I thought they was the weakness should there be a frost etc hence why access what required. If that is not the case I will just bury them! I have it sat right below the 4" waste pipe too so it might actually work to help insulate.

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  12. #7
    Senior Member Rank = Grand Champion davethefish1's Avatar
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    Quote Originally Posted by samp09 View Post
    Oh really? I used the JG pushfit pipes and have checked they are not leaking. I thought they was the weakness should there be a frost etc hence why access what required. If that is not the case I will just bury them! I have it sat right below the 4" waste pipe too so it might actually work to help insulate.
    when you say JG push fit, you mean JG mdpe speedfit....
    https://www.screwfix.com/c/heating-p...nd=jg_speedfit

    i did the same, put the mdpe under the 110mm drain pipe.
    warm water from the drum going down the 110mm drain will help keep the mdpe from freezing in really harsh freezing weather...

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  14. #8
    Quote Originally Posted by davethefish1 View Post
    almost no regs at all about laying pipes After they have exited the house via a double check valve hose union bib tap...
    what would you class a hose pipe laid across the garden all winter...?

    tempory site mains are left laying above ground in the mud most times....

    i'd run it in mdpe insulate it and bury it as deep as you can easily manage.
    mine is 20mm mdpe, 20mm thick insulation where it's clipped to the wall, and buried about 10" deep everywhere else.
    Hiya

    Thanks for taking time to share the images.

    I guess Im a bit spooked as my daughters house has subsidence caused by a leaking drain - I will do as you have and run it above ground until it can cross the open garden. At least if there's ever a leak near the house we will see it :-)

    Do you keep the autofill on all year?

    cheers

    Wayne
    Last edited by wayneakp; 10-05-2022 at 10:45 AM.

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  16. #9
    Senior Member Rank = Grand Champion davethefish1's Avatar
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    Quote Originally Posted by wayneakp View Post
    Hiya

    Thanks for taking time to share the images.

    I guess Im a bit spooked as my daughters house has subsidence caused by a leaking drain - I will do as you have and run it above ground until it can cross the open garden. At least if there's ever a leak near the house we will see it :-)

    Do you keep the autofill on all year?

    cheers

    Wayne
    stick a meter on it (£20) and you will know if there is ever a bad leak...
    water is always on as i need to top up what the drum takes out...

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    Senior Member Rank = Grand Champion samp09's Avatar
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    Quote Originally Posted by davethefish1 View Post
    when you say JG push fit, you mean JG mdpe speedfit....
    https://www.screwfix.com/c/heating-p...nd=jg_speedfit

    i did the same, put the mdpe under the 110mm drain pipe.
    warm water from the drum going down the 110mm drain will help keep the mdpe from freezing in really harsh freezing weather...
    That's the ones! I feel like if it was going to fail it would already have done so. That's one less headache by burying them then!

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  20. #11
    Senior Member Rank = Grand Champion davethefish1's Avatar
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    Quote Originally Posted by samp09 View Post
    That's the ones! I feel like if it was going to fail it would already have done so. That's one less headache by burying them then!
    as long as you used the inserts, and pushed it fully home, it won't leak.

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  24. #13
    So something else popped into my head overnight ...as it does :-)

    I was planning on dripping the autofill into the bio chamber of the Medius - thats an easy pipe run and as the filter is in a shed type thing there is some protection from frost in the winter.

    I guess the risk there though is if the dechorinator stops dechlorinating but then is it any worse filling in the bio chamber than the pond itself???

  25. #14
    Out of interest how are you controlling the flow into the pond? Ball valve??

  26. #15
    Quote Originally Posted by matthyde View Post
    Out of interest how are you controlling the flow into the pond? Ball valve??
    I have a stainless needle valve - not tried it yet though

 

 

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