CaliCombo™ RetroDrain® with OverFlow

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A retrofit solution for the west coast style combo roof drains

Engineered to retrofit existing combination roof and overflow drains and installed from the roof top. The Cali Combination RetroDrain & OverFlow is constructed of aluminum and stainless steel for durability and designed for use with single ply, BUR and modified bitumen roofing systems. The Cali Drain features the RAC Backflow Compression Seal and is compatible with PVC or cast iron leader pipes. It is available in 3-in. and 4-in., as well as in custom sizes.

Features & Benefits

  • Aluminum flange, 0.060-in. thick, 19-in. x 10.5-in.
  • Two 4-in. high strainers constructed of 0.063-in. thick aluminum, 8-in. diameter.
  • Two 6-in. diameter, 0.125-in thick, low profile, aluminum clamping rings.
  • Overflow pipe extending up 2.5-in. from the flange.
  • 9-in. long stems.
  • Features RAC Backflow Compression Seal on both stems.
  • Simple and easy to install from the rooftop.

Approvals & Standards

ANSI/SPRI RD-1 is a national performance standard for retrofit roof drains. While most retrofit drains are not tested to this standard, OlyFlow Insert Drains – including the CaliCombination RetroDrain & OverFlow with RAC Backflow Compression Seal – exceed the standard, which requires that the seal hold a 10-ft. column of water for 24 hours without leaking.

IAPMO PS 97-96 – a standard plumbing industry test designed to check for leakage at connections under a 10 foot head of water for a 24 hour period. This test was performed by the Smith-Emery Company, a nationally recognized independent test laboratory providing physical testing of construction related materials. The RAC Backflow Compression Seal produced no leakage.

Physical Data
Ordering Info
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Installed from the roof's surface, designed to fit into existing primary and secondary overflow drainleaders in re-roofing applications. For use with single ply, BUR and modified bitumen roofing systems and features the RAC Backflow Compression Seal, compatible with PVC or cast iron leader pipes.

Physical Data

Drain Body .080-in. thick aluminum
Seal RAC Backflow Compression Seal requires 7/16-in. wrench
Flange 19-in. x 10.5-in.
Strainer Dome Two 4-in. high strainers constructed of .063-in. thick aluminum, 8-in. diameter.
Stem 9-in. length
Clamp Ring Two 6-in. diameter, .125-in thick, low profile.

Ordering Information

SKUSize (in.)Dome TypePackagingWeight (lbs.)
RACCAL3 3 Aluminum Each 27
RACCAL4 4 Aluminum Each 27

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