Top 7 Gravity Flap 100mm UK – Registers, Grilles & Vents

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1. Europlast

Decor 150x150mm/100G GRAY 4 inch 100 mm Round Plastic Ducting and Fittings for Extractor Fan Ventilation Shutter Flaps-100mm-Gray, nd10zp, Gravity Shutter

Europlast - Ventilation grille with slats, 1150 x 150 mm, diameter 100 mm, colour: grey, concealed screws, made of impact-resistant plastic, made in the EU.
BrandEuroplast
ManufacturerEuroplast
Height4.8 cm (1.89 Inches)
Length15.01 cm (5.91 Inches)
Width14.81 cm (5.83 Inches)
Part NumberND10zb ND10ZP
ModelND10zb ND10ZP

2. Armar Trading LTD

Wall Gravity Flaps 170mm x 170mm / 100mm Duct Collar / Flange Extractor Fan Air Vent Grill Back draft Flap Shutter Ducting Ventilation Cover Collar / Flange 100mm

Armar Trading LTD - Dimension: Øa-100mm, a-140mm, b-140mm, x-170mm, Y-170mm. Simply to Fit. Wall gravity flap with Collar / Flange 100mm on the back. High quality ABS Plastic. Colour - White.
BrandArmar Trading LTD
ManufacturerArmar Trading LTD
Part NumberFlap

3. FUSSY CHOICE LTD

Air vent Gravity flap for 100mm duct, Plastic whiteTN3

FUSSY CHOICE LTD - Fixes to exterior walls using holes provided. Shutter with gravity flaps to protect against backdraught. Light non-corroding rigid PVC for fast trouble free installation available suitable for use in. Domestic housing, in the kitchen, flats and apartments, utility room, shower/bathroom and toilet. Can used in small offices, leisure facilities, medical premises, restaurants and student accommodation.
BrandFUSSY CHOICE LTD
ManufacturerFUSSY CHOICE LTD
Height14 cm (5.51 Inches)
Length14 cm (5.51 Inches)
Width1.5 cm (0.59 Inches)
Part Number221320953723

4. calimaero

Backdraft Shutter 100mm Calimaero™ SEAL 4 inch Backdraught Shutter for all 100 mm Pipes Cooker Hood Exhaust Gravity Flap Made in Germany Inline Backdraught Shutter

calimaero - Backdraught damper dn 100 does what it was developed for. Slide the non return valve into the pipe, the rubber flap prevents cold air from coming back in. The rubber seal is extremely quiet unlike all metal or plastic models. You will be very satisfied with the quality, functionality, value and the easy installation of this backdraft shutter 100mm! The backdraft shutter prevents cold air from flowing back into your house or apartment, through your dryer, bathroom fan or grow tent.

Make sure the flaps open away from the fan. The outer rubber ring around the strong plastic body ensures a perfect seal and secure hold of the exhaust air backflow valve. The gummy prevents annoying rattling when constantly opening and closing, as with cheaper models. Non return valves can be installed in any orientation, even at 45 or 15 degrees.

As the product is made of weather-resistant plastic, you can install the dry damper in high humidity environments. Back draught shutter made of recycled plastic has the optimal size to fit almost all PVC, HG, KG, aluminium flex pipes and spiral ducts. The lack of a moving spring ensures a long service life and saves you time and money. Buy with ease and relax in your draft free living space. Extractor fan draught shutter is easy to install.
Brandcalimaero
Manufacturercalimaero

5. Europlast

Nd10zb, Decor 150x150mm/100G BROWN 4 inch 100 mm Round Plastic Ducting and Fittings for Extractor Fan Ventilation Shutter Flaps-100mm-Brown, Gravity Shutter-Brown

Europlast - Made in EU. Designed to terminate your extract duct to an external wall. Designed to terminate your extract duct to an external wall. Non-return shutter flaps close automatically when not in use. 4inch/ 100mm round male spigot on the back of the grille for indoor or outdoor use. Easy to install, just push-fit duct and fittings together.
BrandEuroplast
ManufacturerEuroplast
Height4.8 cm (1.89 Inches)
Length15.01 cm (5.91 Inches)
Width15.01 cm (5.91 Inches)
Part NumberND10zb ND10ZP

6. Knightsbridge

EX007W WHITE 100MM/4" GRAVITY EXTERIOR SHUTTER WITH FLAPS FOR BACKDRAFT PROTECTION

Knightsbridge - Height: 152 mm. Construction: Polycarbonate. Exterior shutter with gravity flaps to protect against backdrafts. Recessed depth: 605 mm. Width: 152 mm.
BrandKnightsbridge
ManufacturerKNIGHTSBRIDGE
Weight0.11 kg (0.24 Pounds)
Part NumberEX007W

7. Kair

Ducting Air Vent, Kair Brown Gravity Grille 155mm External Dimension with 100mm, 4 inch Round Rear Spigot and Not-Return Shutters

Kair - Easy to install, hydroponics fan, just push-fit duct and fittings together. Suitable to use in compliance with part f building regulations. Perfectly suited bathroom or Kitchen extractor fan, or In-Line Extract Fan.

Gravity flap - no need for springs that could break. Brown plastic ducting air inlet / air outlet with gravity Shutters. 155mm x 155mm external dimension with 4 inch / 100mm round male rear spigot on the back of the grille for indoor or outdoor use. Non-return shutter flaps close automatically when not in use. Static pressure drop in Pascals: 15 l/s = 1094 pa - 30 l/s = 18.

59 pa - 60 l/s = 24. 21 pa. This grille can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, HVAC, positive input, air conditioning, passive ventilation, and Heat Recovery Systems. Free air: 7200mm2. Airflow performance independently tested by BSRIA or BRE. Stops unpleasant odours, noises, or draughts flowing back through your duct.
BrandKair
ManufacturerKair
Height15.5 cm (6.1 Inches)
Length15.5 cm (6.1 Inches)
Weight0.08 kg (0.18 Pounds)
Width4 cm (1.57 Inches)
Part NumberDUCVKC243-BR