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We sell premium quality line sets, fittings and covers at unbeatable wholesale prices so you can win more bids, grow your business faster, and make more money. 

Copper Line Set

The best place to buy HVAC line sets, fittings, & covers is GTH Supply.

We Offer Fast & Free Shipping

Free Shipping

Free ground shipping in North America on all orders over $3k.

Free Pick-up

Free Pick-up

Free in-person pick-up at our warehouse in Tukwila, WA.

Free Local Delivery

Free Delivery

Free local delivery within 25 miles of our Tukwila, WA warehouse.

BEST SELLERS

100% Satisfaction Guaranteed

    GIVING BACK

    With every product you purchase,

    GTH Supply supports local and international charities.

    13MM Insulation 4.1 R-Value

    13 MM Insulation
    4.1 R-value

    Fire Resistant. Fire Rating 25/30

    Fire Rating 25/50

    UV Resistant

    UV Resistant

    Pressure Rating 2100 to 7000 PSI

    Pressure Rating
    2100 to 7000 PSI

    Working Temp -40F to 250F

    Working Temp
    -40F° to 250F°

    Anti Aging

    Anti Aging

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