Plastic Ducting Condensation Trap

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Ventilation Ducting Condensation Trap
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Ventilation Ducting Condensation Trap

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Ref: ROUND DUCT TRAP

From: 4.86 (5.83 Incl. VAT)

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100mm 4" Dia 5.83
125mm 5" Dia 8.34
150mm 6" Dia 10.53


  • Removes condensation from inside your ducting.
  • Supplied with a 20mm overflow flow drain.
  • Available in 100mm, 125mm, 150mm Diameters.



Our Ventilation Duct Condensation Trap is designed to be fitted in-line to help reduce or eliminate condensation in bathrooms, shower rooms, kitchens, and utility rooms or anywhere that has high levels of condensation.

  • Plastic ducting condensation traps are manufactured from flame retardant polymer.
  • Supplied with a 20mm overflow flow drain.
  • Available in 100mm, 125mm, 150mm Diameters.
PLEASE NOTE

Condensation traps are not designed to fit to flexible ventilation ducting. Please use in conjunction with solid PVC ducting. Condensation traps are only suitable in vertical ducting and cannot be used horizontally.

Please also note that the 100mm condensation traps are designed for 100mm and 110mm ducting and as such are a looser fit on 100mm pipe, this is the industry standard.



It is impossible to tell if you need a ventilation duct condensation trap as other factors need to be taken into consideration.

Basically in ducted ventilation systems, condensation will occur when hot, humid air extracted from your bathroom, shower, kitchen or utility room and it hits the cooler surface of your ventilation duct. If the extracted air is sufficiently cooled, the moisture will be condensed back to water and will trap in your ducting.

Things to reduce or eliminate condensation being trapped in your duct.

  • Use a condensation trap with an overflow.
  • Use the shortest duct run to outside.
  • Use insulated ducting.

Use a condensation trap with an overflow.
By using a condensation trap, you can trap the water after it condenses and runs down your ventilation ducting. The overflow pipe will allow excess water to be safely drained away. Please ensure condensation traps are fitted at the lowest point in your ducting.

Use the shortest duct run to outside.
The shorter your duct run, the less chance your extract air has to cool down and condense.


Use insulated ducting

By using insulated ducting, the inner duct layer stays warmer, therefore keeps the extracted air at a higher temperature. The idea is for the water to condense outside the building and not in your ducting.
(Condensation Problems}
When a ventilation duct is installed in an unheated area, such as a cold loft space, condensation can form on the inside of the duct. This moisture can run down the duct and create a potential hazard, such as dripping onto the electrical connections of a fan or cooker hood.

A condensation trap can be used to prevent this problem occurring. The trap is simply connected to the system as part of the vertical duct run and an internal gutter within the trap collects the moisture and then drains it out through a standard overflow-pipe to the outside. This ensures that the moisture cannot enter a potentially hazardous area. The condensation trap should be installed as low as possible, whilst still high enough to maintain a fall on the overflow-pipe.

Alternatively, Fantronix insulated hose may be used but it can be more awkward and time consuming to install. However, it is ideal if a condensation trap cannot be connected to the duct for installation reasons, or the overflow-pipe cannot drain to the outside due to lack of access or the distance
involved.

For additional thermal requirements Fantronix range of insulated pipe, in conjunction with condensation traps can be used to create a more professional installation. It is vital that the solution to condensation problems is carried out in accordance with the latest relevant Building Regulations and/or NHBC Standards.

Approved Document F of the Building Regulations (2006) state: Where a duct rises vertically it may be necessary to fit a condensation trap in order to prevent backflow of any moisture into the product.

NHBC Standards 2007 state: Ducts passing through unheated spaces such as a roof void to the outside air should be insulated or a condensation drain should be provided in accordance with the design.

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