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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. M

    Running 25 mdpe through a wall.

    Hi all, What fittings are best to run this through my wall to sleeve and seal. Do I need to make it up or is there a special sleeve. Cheers
  2. 3

    Help to identify 32mm MDPE pipe manufacturer

    Hi all I need to identify supplier or manufacturer of 32mm blue MDPE pipe (long story, best not to ask!) The pipe has these markings every half metre or so. H2081218 11/12/2018 19:45:01 EN12201 RADIUS 32MM x 3MM SDR11 PE80 12.5 BAR 0.28 KG/MT 32MM x 100M CO-EXTRUDED PIPE000146371...
  3. G

    Joining 32mm mdpe pipe to the mains at the meter

    I've had a 32mm mdpe water pipe put in from my house to the meter which is inside the boundary of my house .How do I join it to the meter ?
  4. Wozza

    32mm MDPE to 2 x 22mm?

    Hi All, Having a new extension built, the water main from the street has been replaced with 32mm MDPE. Currently have a 15mm pipe that feeds the house from the stopcock and get interaction between appliances (shower drops flow when washing machine fills etc) - shower is fed straight from...
  5. M

    20mm MDPE to 22mm copper??

    hi all. I need to a stop tap for 20mm MDPE to 22mm copper but it's doesn't look like a brass tap is available. What's my best option? Not that clued up with mdpe fittings to be honest.
  6. jaydebruyne

    Mdpe

    Gotta do some work on MDPE tomorrow - removing a leaking coupling which looks like a philmac from MDPE to copper. And also adding an elbow. I've never worked with MDPE before. a) can I just cut the pipe with ratchet plastic cutters? b) how does the non compression end of a philmac come away...
  7. J

    mdpe to copper

    Hi Guys, I'm after some general advice about plumbing as we are planning on renovating our house. We are thinking of changing the mains supply to 32 mm as we are under the impression, partly from this website, that bigger is better. What I can't understand is, if we have 32mm mdpe into the...
  8. Riley

    Gas MDPE

    Went to price a couple of issues left by another gas guy who has fallen off the face of the earth. He has done a gas pipe running under a screed floor in MDPE and then 5 meters exposed along an internal wall to the meter position. Basically my question is can MDPE be run on view? It's clipped...
  9. S

    MDPE 32 or 25mm into the house

    Hi, I have just had Thames Water upgrade my mains connection to a 32mm MDPE, however my builder has run a 25mm MDPE after TW stopcock from the property boundary into the house, hence I am wondering if this would have already reduced the pressure I would have had into the house. I would have...
  10. H

    20mm MDPE 1 or 2 metres - Wanted

    Really only need a few metres, if any spare! Cheers.
  11. S

    Yellow 25mm MDPE to supply garden grotto building - what connectors ?

    Hello CORGI plumbers, Prancer & I want to feed natural gas into the garden grotto outbuilding, from the external underground yellow MDPE 25mm external diameter (20.5 I.D.?) pipe. But we don't know what connector(s), isolators, box, wall plate etc is required to transition from plastic to...
  12. J

    Underground FloPlast MDPE

    I'm fitting a floplast-mdpe-female-adaptor Screwfix PtNo 11625 with a brass male-coupler Screwfix PtNo 82086 (i.e. 3/4" brass thread into plastic) It seems a very tight fit, does anyone know if I should use ptfe tape as-well?
  13. M

    Wanted: 32mm MDPE After 2 metres

    Hi All, I have loads of 20mm and 25mm but I recently carried out a water main repair for a customer that had a rupture in 32mm blue MDPE. I will gladly buy a reel of 32 mm if needs be but will have little use for the rest of the reel. I was wondering if anyone has 2 metres they could sell to me...
  14. A

    Replacing lead mains to MDPE

    I have read through all posts about lead mains replacement to MDPE. To get my head round it can any plumbers give a guide to how it's done. I've seen parts of it done once as an apprentice. In my case there is the drive way. So you'd dig up the drive way from the boundary stop valve to the...
  15. B

    converting 1" MDPE to 25mm MDPE

    This is a new one to me. House has some MDPE piping dating from mid-eighties which is 1". I've cut into this to install a T but current 25mm fittings won't fit the pipe. I guess old pipe is .4mm too big. Any suggestions as how to convert? Thanks
  16. W

    MDPE Underground pipe in concrete?

    Hi there, Does anyone know if MDPE under ground pipe has to be protected in some way when being buried in concrete? Thanks in advance :-)
  17. S

    Chlorination of 63mm mdpe incoming cold mains

    Evening folks, I'm about to commence work on a 8 bed new build dwelling, the custard has just emailed me, asking if i know anything about how the incoming mains from road( about 130 metre run). Is it a requirement before or after Anglian water connect it in the road? I've carried out...
  18. R

    50mm MDPE to 42mm Copper HELP!

    Hi guys, Went to an office block where 50mm MDPE to 42mm Copper is leaking. Seems like the leak has been going a while, it's on the brass connector that joins the two pipes. I've struggled to locate a replacement fitting. It was suggested to me to get a 50mm MDPE x 1 1/2 female and a brass...
  19. J

    MDPE in concrete

    Hi, I've extended my mains water mdpe pipe through into my new extension and brought it up through the slab under the new kitchen window. However, I've had to change my kitchen window into a set of French doors and so the pipe is now in the way. I want to break into the slab back down to the...
  20. S

    Using black MDPE pipe instead of hose pipe and connecting it to an outside tap

    My outside tap is at the front of the house and the garden I have to water is at the rear. I run the hose pipe by the shortest possible route. It runs up the front of the house, over the roof and down the rear of the house. This works fine but the hose pipe has to be renewed every few years...
    • Sam1
    • Thread
    • black connecting front hose house installing instead mdpe outside outside tap pipe supply tap using
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board

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