WSC - Water Specialties Company

Welcome to BackflowPreventer.com a Water Specialties Website

  • Double Check Valve Assembly (DCVA) Lay Length Chart
    Manufacturer Model ½″ ¾″ 1″ 1¼″ 1½″ 2″ 2½″ 3″ 4″ 6″ 8″ 10″
    AMES 200B 9 9/16″ 12 1/8″ 14 13/16″ 18 15/16″ 21 3/16″
    2000B 10″ 11 1/8″ 13 1/4″ 16 1/8″ 19 1/2″
    2000CIV/3000CIV 39″ 40″ 52″ 63 1/4″ 75″ 90″
    2000DC/3000DCDC 45 1/2″ 58 7/8″ 68 3/4″ 83 3/4″
    2000SE/3000SE 41 1/2″ 52 1/2″
    2000SS/3000SS 15″ 16″ 16 1/2″ 23 1/2″ 25″ 37″ 38″ 40″ 48 1/2″ 52 1/2″ 55 1/2″
    2001SS/3001SS 36 1/8″ 34 5/8″ 43 5/8″ 45 5/8″
    C-200/C-300 31″ 31 11/16″ 33 11/16″ 43 1/2″ 50″ 57 1/2″
    M-200/M-300 31″ 31 11/16″ 40 1/2″ 48 3/16″ 55″ 57 1/2″
    Buckner 2410 12 1/4″ 13 5/8″ 17 1/4″ 17 1/4″ 18 1/2″
    Cla Valve D/D2 17 1/16″ 16 13/16″ 21 1/4″ 21 5/8″ 28 11/16″ 42 3/16″ 42 3/16″ 48 1/4″ 61 1/4″ 74″ 86″
    D4 30 1/2″ 42 3/16″ 42 3/16″ 48 3/16″ 61 3/16″ 73 15/16″ 85 3/4″
    Conbraco 40-100 Series 13″ 14 3/4″ 20 3/4″ 21 3/8″ 23 1/8″ 37 1/16″ 38 1/16″ 46 3/4″ 63″ 75″ 88 1/4″
    4A-100 Series 11″ 12 3/4″ 14 5/8″ 18 5/8″ 18 3/4″ 21 1/8″
    4S-100 Series 32 1/8″ 33 1/8″ 34 5/8″ 39 1/8″ 50 1/8″ 55 3/4″
    Febco 805 11 5/8″ 12 5/8″ 17 5/8″ 18 1/2″ 34 1/2″ 38 1/8″
    805/805YD 11 3/8″ 12 7/8″ 17 7/8″ 18 5/8″ 37 3/16″ 41 11/16″ 50 7/16″ 59 11/16″ 69 3/16″ 84 3/16″
    806/806YD 41 11/16″ 50 7/16″ 59 11/16″ 69 3/16″ 84 3/16″
    850/856 10″ 10 3/4″ 12 1/2″ 15 7/8″ 16 3/8″ 17 5/8″ 40 3/4″ 41 7/8″ 46 1/4″ 56″ 65″ 72 5/8″
    Flomatic DCV 31 1/4″ 32 1/4″ 39″ 42″ 50 1/2″ 58 3/4″
    DCVE 12″ 13″ 20″ 19″
    Hersey/Beeco DDC1 48 3/4″ 49 3/16″ 51 3/16″ 66 3/16″ 76 3/16″ 98 3/16″
    DDC III 40 5/8″ 47 1/2″ 62″ 75 1/2″ 88″
    FDC 14 1/4″ 15 1/4″ 20 1/4″ 23 1/4″
    6 41″ 43″ 51″ 56″ 72″ 85″ 80″ 89″
    6C 18″ 18 3/8″ 35 1/8″ 40 1/8″ 46 5/8″ 59 5/8″ 90 3/4″ 100 1/4″
    Mueller H9505 55 3/16″ 64 3/16″ 80 3/16″ 88 3/16″
    Rockwell 711 25 1/4″ 29 1/4″ 30 1/4″ 35″ 46 1/4″
    Viking A1 51″ 66″ 73″ 82″
    Watts 007 10″ 14″ 15 1/4″ 22″ 22 3/4″ 33 1/8″ 34 1/8″
    007M1 12 1/4″ 13 1/4″ 18 3/8″ 19 1/2″
    007M2 11 1/8″ 16 3/8″ 16 3/4″
    007M3 11 1/8″
    700 13″ 15 1/16″ 20 1/2″ 21″
    709 11 3/4″ 13″ 16 1/2″ 17 1/4″ 19″ 39 3/8″ 40 3/8″ 52 3/8″ 62 7/8″ 75″ 90″
    719 9 9/16″ 12 1/8″ 14 13/16″ 18 15/16″ 18 15/16″ 21 3/16″
    757 30 1/2″ 31 3/8″ 33 1/2″ 44″ 50″ 56 1/2″
    770 47 1/8″ 58 1/2″ 70 3/8″
    772 45″ 57 1/4″ 59 1/4″ 72 13/16″
    774 38″ 38″ 40″ 48 1/2″ 52 1/2″ 55 1/2″
    774X 41 1/2″ 52 1/2″
    775 9″ 11 1/4″ 15 3/8″ 15 3/8″ 18 1/2″ 36 1/8″ 34 5/8″ 43 5/8″ 45 5/8″
    Wilkins 350 11″ 12 1/4″ 14 7/8″ 15 1/4″ 16″ 31″ 32″ 37 5/8″ 44 3/4″ 60 3/4″ 63 3/4″
    3500A 33 1/2″ 31″ 32″ 37 5/8″ 44 3/4″ 60 3/4″ 63 3/4″
    350A/350ADA 35 1/8″ 36 1/8″ 38″ 47″ 61 5/8″ 64 5/8″
    550/550DCDA 13 3/4″ 14 3/4″ 19 1/4″ 19 3/4″ 21″ 35″ 36″ 46″ 57″
    950/950XL/950DA 11 1/4″ 12 1/4″ 15 1/2″ 17 1/8″ 18 1/4″ 37 1/8″ 38 1/8″ 50 1/4″ 62 1/8″ 71 1/8″ 84 1/8″
    950XLT 13″ 14″ 19 5/8″ 20 5/16″ 21 3/8″

    **All dimensions are based on horizontal devices and are approximate inches

    **All 1/2 - 2″ lengths are Ball Valves

    **All 2 1/2 - 10″ length are Flanged Gate Valves

    Reduced Pressure Zone (RPZ) Lay Length Chart
    Manufacturer Model ½″ ¾″ 1″ 1¼″ 1½″ 2″ 2½″ 3″ 4″ 6″ 8″ 10″
    AMES 400B 12 1/8″ 14 1/2″ 18 1/8″ 18 3/4″ 21 1/16″
    4000B 10″ 10 3/4″ 16 3/4″ 17 3/8″ 21 3/8″
    4000CIV/5000CIV 41 1/4″ 42 1/4″ 55 1/8″ 65 1/2″ 78 1/2″ 93 5/8″
    4000RP/5000RPDA 45 1/2″ 58 7/8″ 68 3/4″ 71 3/4″
    4000SS/5000SS 37″ 38″ 40″ 48 1/2″ 52 1/2″ 55 1/2″
    4001SS/5001SS 36 1/8″ 34 5/8″ 43 5/8″
    C-400/C-500 30 1/2″ 31 3/8″ 33 1/2″ 44″ 50″ 56 1/2″
    M-400/M-500 31″ 31 11/16″ 40 1/2″ 48 3/16″ 55″ 57 1/2″
    Buckner 2400 12 1/4″ 13 5/8″ 17 1/4″ 17 1/4″ 18 1/2″
    Cla Valve RP1/RP2 17 1/16″ 16 7/8″ 21 1/4″ 21 11/16″ 29 1/4″ 42 3/16″ 42 3/16″ 48 1/4″ 61 1/4″ 74″ 86″
    RP4 33 11/16″ 42 3/16″ 42 3/16″ 48 3/16″ 61 3/16″ 73 15/16″ 85 11/16″
    Conbraco 40-200 Series 10 3/4″ 13 3/4″ 15 3/8″ 17 1/2″ 19 1/2″ 21 1/2″ 37 5/16″ 38 5/16″ 46 3/4″ 63 3/8″ 75 3/8″ 88 3/8″
    4A-200 Series 11 1/8″ 12 3/4″ 14 5/8″ 18 5/8″ 18 3/4″ 21 1/8″ 31 1/4″ 32 1/4″ 38 1/8″ 45 7/8″ 53 1/2″
    4D-200 Series 35 1/2″ 37 1/2″ 39 7/8″ 45 5/8″
    45-200 Series 32 1/8″ 33 1/8″ 36 5/8″ 42 5/8″ 52 5/8″ 55 5/8″
    Febco 825Y/825YD/825D 12″ 12 3/4″ 14 1/4″ 17 17 3/4″ 37 3/16″ 41 11/16″ 50 7/16″ 59 11/16″ 69 3/16″ 84 3/16″
    860/866 10″ 10 3/4″ 12 1/2″ 15 7/8 16 3/8″ 17 5/8″ 40 3/4″ 41 7/8″ 46 1/4″ 56 ″ 65 ″ 72 5/8″
    867 33 1/4″ 34 1/4″
    880 w/ Flanged Setter 23 1/2″ 23 1/2″ 27″ 32″ 36 1/2″ 43″
    Flomatic RPZ 31 1/4″ 32 1/4″ 39″ 42 5/8″ 52 1/2″ 60″
    RPZE 12″ 13″ 14 3/8″ 19″ 20″
    RPZE III 9 1/4″ 9 3/4″ 17″
    Hersey/Beeco FRP III 14 1/4″ 15 1/4″ 19 3/4″ 20 1/4″ 23 1/4″
    6CM (Bronze) 35″ 40″ 47 1/2″ 62″
    6CM (Cast Iron) 36 1/2″ 40″ 47 1/2″ 62″ 75 1/2″ 88″
    Mueller H9506 12″ 13″ 19″ 20″ 31 1/4″ 32 1/4″ 39″ 46″ 52 1/2″
    Rockwell 701 25 1/4″ 30 1/4″ 35″
    Watts 009 10″ 14 3/4″ 16 3/4″ 21 1/8″ 22″ 22 3/4″ 33 1/4″ 34 1/4″
    009M1 22 1/8″ 20 1/4″ 21 3/8″
    009M2 10 3/4″ 14 1/2″ 17 3/8″ 17 7/8″ 23 3/8″
    009M3 10 3/4″
    900 9″ 9″ 9 3/16″ 14 3/4″ 14 3/4″ 36 1/2″ 37 1/2″ 45 11/16″ 59 9/16″
    909/909M1/909RPDA 14 3/8″ 15 3/8″ 18 1/2″ 19″ 19 1/2″ 41 1/4″ 42 1/4″ 55 1/8″ 66″ 78 1/2″ 93 5/8″
    919 9 1/2″ 12 1/8″ 14 1/2″ 18 1/8″ 18 3/4″ 21 1/16″
    957/957RDPA 30 1/2″ 31 3/8″ 33 1/2″ 44″ 50″ 56 1/2″
    990 46 7/8″ 58 3/8″ 69 7/8″
    992/992RDPA 45″ 57 1/4″ 59 1/4″ 73 1/2″
    994/994RPDA 37″ 38″ 40″ 48 1/2″ 52 1/2″ 55 1/2″
    995 9″ 11 1/2″ 15 3/8″ 15 3/8″ 36 1/8″ 34 5/8″ 43 5/8″
    Wilkins 375/375ADA 8 7/8″ 8 7/8″ 11 3/16″ 14 7/8″ 15 1/4″ 16″ 31″ 32″ 37 5/8″ 44 3/4″ 60 3/4″ 63 3/4″
    375A/375ADA 35 1/8″ 36 1/8″ 38 1/4″ 47 1/4″ 62″ 64 5/8″
    575/575RDPA 13 3/4″ 14 3/4″ 19 1/4″ 49 3/4″ 21″ 35″ 36″ 46″ 57″
    975/975XL/975DA 10″ 12″ 13″ 17″ 17 3/8″ 18 1/2″ 37 1/8″ 38 1/8″ 50 1/4″ 62 1/8″ 71 1/8″ 84 1/8″

    **All dimensions are based on horizontal devices and are approximate inches

    **All 1/2 - 2″ lengths are Ball Valves

    **All 2 1/2 - 10″ length are Flanged Gate Valves

    Popular Brands