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FREE SHIPPING ON ORDERS OF $150+ OR MORE. EXCLUSIONS APPLY ON FREIGHT SHIPPING.
FREE SHIPPING ON ORDERS OF $150+ OR MORE. EXCLUSIONS APPLY ON FREIGHT SHIPPING.

Couplings & Reducing Couplings

Philmac Couplings are used when attaching HDPE pipe to HDPE pipe. Reducing couplings are used when you are going from one size HDPE to another size of HDPE. 


  • There are 2 types of HDPE pipe. Inside control diameter (ASTM D2239) and Outside control diameter (ASTM D-3035).
  • We only supply Outside Control Diameter HDPE Pipe. 
  • Philmac fittings we carry are made for the outside control diameter pipe.
  • Rated to 230psi: 3G compression fittings are pressure rated to 230 psi to meet the need of the high pressure systems.
  • 50 Year+ Design Life: Built to withstand the toughest conditions to ensure longevity and durability, 3G compression fittings have a 50 year+ design life

    • HIGH PERFORMANCE Made from advanced thermoplastic materials: 3G ID Series compression fittings are manufactured from lightweight high performance thermoplastic materials which, unlike metal fittings, resist corrosion, therefore significantly minimizing maintenance, repairs, and long-term costs. The materials are non-toxic and taint-free and also offer outstanding impact, UV, and chemical resistance.

      ***We can Special Order the CTS-OD and the IPS-ID fittings but you must call those orders in as they are a Special Order and there are no returns on those items. ***

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        Original price $17.75 - Original price $17.75
        Original price
        $17.75
        $17.75 - $17.75
        Current price $17.75

        1" Coupling

        1" Coupling IPS-OD

        Original price $17.75 - Original price $17.75
        Original price
        $17.75
        $17.75 - $17.75
        Current price $17.75
        Original price $12.15 - Original price $12.15
        Original price
        $12.15
        $12.15 - $12.15
        Current price $12.15

        3/4" Coupling

        3/4" Coupling IPS-OD

        Original price $12.15 - Original price $12.15
        Original price
        $12.15
        $12.15 - $12.15
        Current price $12.15
        Original price $29.15 - Original price $29.15
        Original price
        $29.15
        $29.15 - $29.15
        Current price $29.15

        1-1/4" Coupling

        1-1/4" Coupling IPS-OD

        Original price $29.15 - Original price $29.15
        Original price
        $29.15
        $29.15 - $29.15
        Current price $29.15
        Original price $35.95 - Original price $35.95
        Original price
        $35.95
        $35.95 - $35.95
        Current price $35.95

        1-1/2" Coupling

        1-1/2" Coupling IPS-OD

        Original price $35.95 - Original price $35.95
        Original price
        $35.95
        $35.95 - $35.95
        Current price $35.95
        Original price $45.35 - Original price $45.35
        Original price
        $45.35
        $45.35 - $45.35
        Current price $45.35

        2" Coupling

        2" Coupling IPS-OD

        Original price $45.35 - Original price $45.35
        Original price
        $45.35
        $45.35 - $45.35
        Current price $45.35
        Original price $22.95 - Original price $22.95
        Original price
        $22.95
        $22.95 - $22.95
        Current price $22.95

        1" x 3/4" Reducing Coupling

        1" x 3/4" Reducing Coupling IPS-OD

        Original price $22.95 - Original price $22.95
        Original price
        $22.95
        $22.95 - $22.95
        Current price $22.95
        Original price $43.20 - Original price $43.20
        Original price
        $43.20
        $43.20 - $43.20
        Current price $43.20

        1-1/4" x 1" Reducing Coupling

        1-1/4" x 1" Reducing Coupling IPS-OD

        Original price $43.20 - Original price $43.20
        Original price
        $43.20
        $43.20 - $43.20
        Current price $43.20
        Original price $64.05 - Original price $64.05
        Original price
        $64.05
        $64.05 - $64.05
        Current price $64.05

        1-1/2" x 1" Reducing Coupling

        1-1/2" x 1" Reducing Coupling IPS-OD

        Original price $64.05 - Original price $64.05
        Original price
        $64.05
        $64.05 - $64.05
        Current price $64.05
        Original price $65.15 - Original price $65.15
        Original price
        $65.15
        $65.15 - $65.15
        Current price $65.15

        1-1/2" x 1-1/4" Reducing Coupling

        1-1/2" x 1-1/4" Reducing Coupling IPS-OD

        Original price $65.15 - Original price $65.15
        Original price
        $65.15
        $65.15 - $65.15
        Current price $65.15
        Original price $41.85 - Original price $41.85
        Original price
        $41.85
        $41.85 - $41.85
        Current price $41.85

        1-1/4" x 3/4" Reducing Coupling

        1 1/4" x 3/4" Reducing Coupling IPS-OD

        Original price $41.85 - Original price $41.85
        Original price
        $41.85
        $41.85 - $41.85
        Current price $41.85
        Original price $85.98 - Original price $85.98
        Original price
        $85.98
        $85.98 - $85.98
        Current price $85.98

        2" x 1-1/4" Reducing Coupling

        2" x 1-1/4" Reducing Coupling IPS-OD

        Original price $85.98 - Original price $85.98
        Original price
        $85.98
        $85.98 - $85.98
        Current price $85.98
        Original price $57.95 - Original price $57.95
        Original price
        $57.95
        $57.95 - $57.95
        Current price $57.95

        1-1/2" x 3/4" Reducing Coupling

        1-1/2" x 3/4" Reducing Coupling IPS-OD

        Original price $57.95 - Original price $57.95
        Original price
        $57.95
        $57.95 - $57.95
        Current price $57.95

        LARGE QUANTITY ORDERS

        For orders containing a large quantity of items we recommend to contact us for our best shipping rates by calling:
        888-251-3934