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.
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.
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.
Superior productivity. Superior performance.