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    Grosvenor Plumb's Avatar
    Grosvenor Plumb Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Dec 23, 2008, 12:28 PM
    Loss of pressure!
    I have a loss of hot water pressure from the hot tap in the kitchen after 30 seconds or so. It is fed from a combi boiler, any ideas?
    21boat's Avatar
    21boat Posts: 2,441, Reputation: 212
    Ultra Member
    		  
    #2

    Dec 23, 2008, 02:22 PM

    Watter pressure.
    "A" By volume large pipe (low pressure) a lot of water.

    "B" By pressure: Smaller pipe (higher pressure) a lot of water.

    A and B pipes will equal the same amount of water flowing in a bucket.

    What changes that is "pressure"

    A domestic coil in a boiler overtime can build lime deposits. Restrict the water flow.
    Any restricted water line in system same result.

    Did this just happen all of a sudden? Is there a shutoff valve on that line ? What type of faucets there? If valve seat or cartridge in faucet doesn't open fully same symptoms.
    Could be a "T" fitting on the water line restricted on part of "T" same result
    Please provide: water line info , copper, cpvc galv iron. Black iron, Hot line 3/8 1/2 style of faucet? Just this line?
    More Info Please> Boat 21
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