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Bottle Air Vent 15mm (34359)

£ 8.38INC VAT

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Bottle Air Vent 15mm (34359)

Automatic bottle-type air vent and valve. Releases trapped air from sealed heating systems. Suitable for up to 10bar.

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View all: Essentials Bottle Air Vents

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Rated 4 out of 5 by from Very decent product I did struggle in the past with venting the system - within the house, pipes were set up more or less like "n" while plumb lines were in opposite corners and the vertical line run along the loft. Nightmare: internal Vaillant air venting was struggling more than 3 days to purge the air out, with lots of burping and system farting, plus frequent manual all heaters venting. Fitted in the highest point of the pipe in loft - problem solved immediately: one system refill, one heater venting, pressure adjustment and it's done for good straight away. These automatic air vents WILL FAIL - sooner or later - buy two, keep it nearby and remember - put the valve below it!!
Date published: 2021-08-18
Rated 4 out of 5 by from Auto air vent Good product easy to install and metal screw top on air vent is better than any plastic ones.
Date published: 2021-08-04
Rated 5 out of 5 by from Easy to use Bottle Vent I have installed these Bottle Vents at every point where air may need to be bled off. They are easy to fit and work perfectly and with the addition of a threaded sealing cap they can also prevent "air drawback" where this may be a problem.
Date published: 2021-05-07
Rated 5 out of 5 by from Bottle vent Easy to use and fit on to 15mm pipework no adaptors required
Date published: 2021-04-30
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Valve on top

Does the valve on top of these have to be loosened for air to escape or does it remain closed ?
Asked by: Andymav

Is there a minimum operating pressure to expel air, or will it work at any pressure above atmospheric? I have an open vent system so need a bleed valve that does not require high pressure to work.

Asked by: 4791

Can this be used in the domestic hot water feed pipe from hot water cylinder to taps to prevent air locks?

Will be a temporary installation in place for a few weeks where this pipe run would have a rise and fall creating a vertical loop between 300 and 600mm high with nowhere to vent to otherwise
Asked by: BCeng
Hello BCeng, Screwfix are not able to offer specific plumbing/installation advice and always recommend speaking with a suitably qualified tradesperson. Thank you for using Screwfix Q&A.
Answered by: AMargetts
Date published: 2022-06-12

Bottle Air Vent or End Feed Air Vent Cap Capillary

My End Feed Air Vent Cap needs replaced. Can I use the Bottle Air Vent? The compression joint of the Bottle Vent is easier than needing to fully drain the system so I can solder the other type on.
Asked by: Scott2012
Hello, Thank you for your enquiry. Screwfix are not able to offer specific plumbing/installation advice and always recommend speaking with a suitably qualified tradesperson. Thank you for using Q&A.
Answered by: Screwfix778
Date published: 2021-02-25

How many needed?

I have air in my central heating system. We removed a radiator from the loft as it was no longer needed. Do I need 2 of these for each pipe left up there or just the 1?
Asked by: Stephen2016
Hello Stephen2016, We are not able to advise you on this and would recommend you speak to a qualified tradesperson. Thank you for using Q&A SW
Answered by: SWake
Date published: 2020-07-15
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Specification
Brand Essentials
Manufacturer Guarantee 1 Year Guarantee
Max. Working Pressure 10 bar
Pack Size 1
Pieces in Pack/Case 1
Product Diameter 15 mm
Product Type Bottle Air Vent