A siphon on the condensate line stops drain odours coming back up the pipe into an air conditioner or a heat pump. It goes where the condensate line joins a waste pipe.
CLI04542 CBM transparent PVC drain siphon – odor trap for 16/18mm condensate pipes, compact, durable, easy to clean, prevents sewage gases, Made in EU.
DHB-1416 (CLI04621) INABA DENKO check valve, anti-odour siphon for condensate pipe 14/16/18mm
INABA DENKO DHB-1416 (CLI04621) condensate drain trap for air conditioners prevents unpleasant odors and insects from entering through the condensate drain line. Compact mini condensate siphon with a transparent PVC body for easy inspection and vertical installation.
HL 138N flush-mounted air conditioner condensate trap for concealed condensate drainage systems. Suitable for Ø20–32 mm pipes, this AC condensate drain trap effectively prevents sewer odours from entering indoor spaces and features an easily removable trap cartridge for simple maintenance.
Tecnosystemi TCR-21 siphon (11126322) – anti-odor condensate drain trap with sealing rings. Durable PVC, for 21mm connection, horizontal/vertical installation.
Tecnosystemi 11126008 anti-odor condensate trap for Ø32 mm condensate drain pipes prevents unpleasant odours and insect entry in air conditioning and HVAC drainage systems. Designed for VRV and VRF systems, this 32 mm condensate drain siphon features a removable inspection cover for easy cleaning, a 60 ml/min flow rate, and quick horizontal installation, ensuring reliable condensate drainage and long-lasting performance.
Tecnosystemi 11126318 insect-proof condensate drain trap protects air conditioner and HVAC condensate pipes from insects while ensuring reliable condensate drainage. Made from transparent PVC for easy inspection, it is designed for vertical installation and fits Ø18/20 mm inlet and Ø16/18 mm outlet condensate pipes.
Tecnosystemi 11126322B REGIO waterless siphon – anti-odor drainage trap with ball mechanism, level indicator, removable transparent body, easy wall installation. For 16/18/20/21/30mm condensate pipes.
Tecnosystemi transparent dry anti-odor siphon STOP SCD300004 – compact PVC condensate siphon with anti-odor ball, built-in spirit level, easy maintenance and inspectable. Suitable for pipe with diameter Ø 21mm.
Tecnosystemi transparent dry anti-odor siphon STOP SCD300006 – high-strength PVC condensate siphon with anti-odor ball, built-in spirit level, and easy maintenance and inspectable. Suitable for pipe with diameter Ø 21mm. Made in Italy.
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Anti-odour, anti-insect and waterless siphons
Between them, the anti-odour siphons here fit drain pipe from 14 to 40 mm. Each one is made for its own pipe size and mounting position, vertical or horizontal, so check both against the drain line. Options include a waterless siphon with a removable cover, one with an insect barrier and one with a check valve.
The siphon connects to the condensate drain pipe that comes from the unit.
Common questions
Does a condensate line need a siphon?
Yes, where it joins a waste pipe. Without one, drain odours and air can travel back up the line to the unit.
What is a waterless siphon?
It closes the line without a water seal, so it cannot dry out when the unit makes no condensate. The waterless siphon here also has a removable cover.
