The Heavy Duty Manifolds are designed to allow high flow rates. The manifolds are available in 2 way or 4 way as 3/8" barb, 1/2" barb and 5/8" barb.

The 3/4" inlet connects to your air pump or compressor. The mulitpleoutlets will connect to air hose delivering air to your diffusers. The fittings are high quality brass. Size the manifold to your air pumps air output.

HK25L through HK80L air flow can handle 2 way or 4 way manifolds.

HK100L and HK120L should use the 2 way with 5/8" barb or the 4 way with 3/8" barb so as not to restrict air flow.

NOTE !! The outlet fitting of the HK25L through HK100L pump is a 5/8" diameter. You can connect the 5/8" pump outlet directly to the 3/4" manifold inlet with a short piece of 5/8" or 3/4" hose ( supplied with air pump). The 2 way or 4 way manifold outlets are available in 3/8", 1/2" and 5/8" so please order the size that best fits your air hose. The HK120L outlet fitting is 1". You will need a reducer hose from 1" to 3/4" (supplied with HK120L) in order to connect the HK120L to the manifold inlet.  The HK120L air pump should feed one 1 inch hose or two 5/8" hoses or four 3/8" hoses to feed your air diffusers.

The 1/4 HP Rocking Piston Compressors can use 2 way or 4 way manifold.

The 1/2 HP and 3/4HP rocking Piston Compressors should use the 4 way manifold.