Red & Blue Water Hoses

Discussion in 'General Discussion' started by bjac, Oct 12, 2019.

  1. bjac

    bjac Member SILVER Sponsor

    Jul 13, 2008
    Kingston, Ontario, Canada
    2004 Sea Ray 320 Sundancer
    Twin 350 Mag MPI 300hp w/Bravo III Drives
    Hi All:
    I had the plastic end of my heater hose (Red Uniflex 1/2" No. SF-858) split when disconnecting for winter storage. I thought I could just buy a new end and cut the old one off but alas, nowhere can I find a tight fitting end to re-insert into the hose end with a 1/2" female swivel (either brass or plastic). Without switching to Pex hoses (which fit nicely but do not bend well) has anyone else replaced these hoses or ends? If so what and where did you find the parts and pieces.
    Thanks in advance.

  2. Henry Boyd

    Henry Boyd Well-Known Member GOLD Sponsor

    Apr 24, 2007
    Newburyport, on the peaceful and serene Merrimack
    ‘09 Sabre 38 Hardtop Express “Serenity”
    Volvo D6 w/IPS450 Pods
    I believe it’s because the water lines are 15mm and not ½”. For parts I’ve used

    LG111 and Chris-380 like this.
  3. bbwhitejr

    bbwhitejr Well-Known Member SILVER Sponsor

    Apr 14, 2013
    Lake Lanier GA
    2007 44DB
    Cummins QSC 8.3s
    A 1/2” Pex female fitting will work, but the 1/2” clamp will not fit over the outside of the hose as the wall is too thick. Search this site for info. TTmott used regular hose clamps and cranked them down tight. I used a spring clip and have had no issues. I have replaced 80% of all female fittings.

  4. atrick

    atrick Active Member

    Mar 4, 2017
    1995 searay 290 Sundancer
    1990 21 maxum
    Twin 4.3 mercrusers with alpha one genII drives
    305 chevy with a alpha one drive
    They make thee different style clamps for pex, one the standard clamp another is a type of ratchet clamp, third is a type of crimp like the old style fuel line clamps on cars, down side you need the special tools for each. the last two will probably work but I've never tried them
  5. ttmott

    ttmott PhD in OCD GOLD Sponsor

    Apr 3, 2012
    Space Coast Florida
    2006 52 Sedan Bridge
    Cummins QSM11
    Whatever clamp you use warm the hose end up with a heat gun; it will become soft and pliable and easily conform to the smaller PEX fittings.
  6. paulswagelock

    paulswagelock Well-Known Member

    Oct 25, 2010
    2018 SDX 270 OB 300 Verado
    Verado 300
    Whale systems makes the 15mm stuff you need.
  7. JVM225

    JVM225 Well-Known Member GOLD Sponsor

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    You can order 15mm from Defender.

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