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mdpe

Medium-density polyethylene (MDPE) is a type of polyethylene defined by a density range of 0.926–0.940 g/cm3. It is less dense than HDPE, which is more common.
MDPE can be produced by chromium/silica catalysts, Ziegler-Natta catalysts or metallocene catalysts. MDPE has good shock and drop resistance properties. It also is less notch sensitive than HDPE. Stress cracking resistance is better than that of HDPE. MDPE is typically used in gas pipes and fittings, sacks, shrink film, packaging film, carrier bags, and screw closures.In the United Kingdom, black (or blue) MDPE is often used for water and waste water plumbing, and may also be referred to as 'black alkathene.'

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  1. J

    5 taps on an 20mm MDPE pipe?

    I work at a stables and i'm setting up some taps using 20mm MDPE piping I was wondering if there would be enough water and pressure to power the taps from the main pipe for them to be usable. The taps will just be taken from the MDPE pipe which is buried and will come straight out the ground at...
  2. C

    Connecting 25mm MDPE to 15mm copper

    I am trying to fit an outside tap by running water from a shed which used to have a toilet, but the pipe coming into the shed is black 25mm MDPE, what is the best way of connecting it to 15mm copper? Any help please? Cheers
  3. R

    Are all MDPE pipe makes the same size

    Just got some 25mm floplast fittings and inserts (black) and some 25mm MDPE blue pipe. The problem is the floplast inserts only go in about 10mm into the pipe and are too tight to go further. The MDPE pipe is waven. I tried white inserts polypipe and they fitted ok. I know you cant mix...
  4. W

    25mm MDPE to 22mm stopcock Advice

    I am replacing my old water mains with a new 25mm MDPE (blue) pipe and im looking for advise on how to connect it best to my existing stopcock. Is there a fitting out there that would fit on to the 25mm MDPE and connect directly to stopcock. The stopcock currently has a 22mm pipe connected...
  5. W

    Is this 20mm mdpe pipe?

    Coming up from floor into internal stopcock. Only put a new stopcock on mdpe once. Had a clear look at a good run of it. This was a little harder to identify give position and poor light. I've put next(ish) to it a 25mm mdpe -> 15mm copper stopcock for comparison of size. Almost looked like...
  6. D

    Can anyone recommend what size MDPE Blue pipe connection to mains water?

    I'm in the process of setting up a toilet/shower block on a farm campsite. We need to connect to mains water which is 600m away to i'm not sure what size mdpe pipe to use. the shower/toilet block consists of 7wc's, 7 basins, and 5 showers powered by a tank fed Andrew's Gas Water heater. Any...
    • dunny1234
    • Thread
    • anyone block connection mains mdpe pipe recommend shower size toilet water
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  7. M

    Name that fitting: 3/4" LCS to 15mm MDPE

    As the title suggests, I know what I want, I'm going to have to go out to a merchant tommorrow (on a god dam sunday) and ask for one, I just wanted to be pre-armed with a name and not start some Lionel Blair "give us a clue" mimes. it's a compression fitting, a large plastic thing, I've used...
  8. G

    Installation check.

    I recently had a new extension built with full plumbing, central heating etc. After 3 months the mains fitment (plastic to metal) came away and the kitchen/diner was flooded with the new £2000 floor ruined. The plumber blaimed the Plasson fitment but Plasson blamed the plumber. To cut a long...
    • Glosterboy
    • Thread
    • central central heating check copper fitting google heating industry inside installation kitchen mains mdpe metal pipe plumber plumbing sink vent water
    • Replies: 11
    • Forum: Plumbing Jobs | The Job-board
  9. G

    water supply to garage

    I am looking at putting a washing machine in my garage that is about 10m from the house what is the best way of getting a cold feed into the garage what type of pipe/fittings should i use
    • gates1979
    • Thread
    • cold convert drainage garage mdpe pipe problem sink supply tee underground wall water winter
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  10. M

    Compression fittings A or B

    Alright back in college we were told that you cant use a certain type of compression fitting underground. You have to use a manipulative fitting. Now im going to be altering some MDPE for a customer and all i can find is this sort of fitting Plasson Compression Elbow 25mm MDPE Pipe on eBay (end...
    • mrlennie
    • Thread
    • compression copper diy fitting fittings job mains mdpe metal oil pipe plumbing underground water water mains
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  11. W

    32mm MDPE x 1" backplate elbow

    Need one of these for a 1" outside tap for a farm. Anyone have a catalogue and can give me a stock code? Can't find on the net. Ta
  12. K

    MDPE to copper shank adaptor problems

    I'm a diy'er but dome some plumbing before and I'm trying to fit a 20mm x 15mm adaptor. The problem is I can't get the olive to slide over the pipe and neither will the pipe slide inside the body of the adaptor. I thought I had been given the wrong size adaptor but the pipe stiffener which came...
    • kay
    • Thread
    • adaptor copper diy fitting green hot inside mdpe merchants metal pipe plumbing pressure problem problems remove wall
    • Replies: 13
    • Forum: Plumbing Jobs | The Job-board
  13. U

    Running new MDPE pipe to water main

    Hi All Looking for quick bit of advice.... been asked to replace old galvanised pipe work with MDPE due to corrosion... What size pipe would you recommend 20mm or 25mm?? as this will join onto some existing 1/2" Black alkathene BS1972 pipework that feeds into the house...
    • UKPITA
    • Thread
    • cold cylinder gravity hot inside main mdpe pipe property running system water work
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  14. L

    MDPE for external hot water supply?

    Hi Guys I have a customer who wants me to plumb in a hot water supply to her shed. Can it be done? It will be about a 3 metre pipe run, under large paving slabs. Has anyone had experience with this kind of thing? Can it be run in blue MDPE? (I guess I'll need some frost tape and lagging etc.)...
    • Lance Williams
    • Thread
    • cheap cold drain electric external flushing hot hot water hot water supply install insulation job mdpe outside tap pipe pipes sealed supply system tap tee water
    • Replies: 8
    • Forum: Plumbing Jobs | The Job-board

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