![4 INCH 100MM Round Soil and Vent Condensation Trap with Overflow - Stop Water Leakage Back in to Your Duct Work - DUCTING Fittings by KAIR Ventilation : Amazon.co.uk: DIY & Tools 4 INCH 100MM Round Soil and Vent Condensation Trap with Overflow - Stop Water Leakage Back in to Your Duct Work - DUCTING Fittings by KAIR Ventilation : Amazon.co.uk: DIY & Tools](https://m.media-amazon.com/images/I/41bNxKEvm+L._AC_SY355_.jpg)
4 INCH 100MM Round Soil and Vent Condensation Trap with Overflow - Stop Water Leakage Back in to Your Duct Work - DUCTING Fittings by KAIR Ventilation : Amazon.co.uk: DIY & Tools
![How Mechanical Traps Work: A Look at their Mechanism and Merits | TLV - A Steam Specialist Company (UK) How Mechanical Traps Work: A Look at their Mechanism and Merits | TLV - A Steam Specialist Company (UK)](https://www.tlv.com/global/images/steam_theory/mechanical-steam-traps/mechanical-steam-traps3.gif)
How Mechanical Traps Work: A Look at their Mechanism and Merits | TLV - A Steam Specialist Company (UK)
![How Mechanical Traps Work: A Look at their Mechanism and Merits | TLV - A Steam Specialist Company (UK) How Mechanical Traps Work: A Look at their Mechanism and Merits | TLV - A Steam Specialist Company (UK)](https://www.tlv.com/global/images/steam_theory/mechanical-steam-traps/mechanical-steam-traps2.gif)