These did not work, had to loosen both to let air out as it did not auto bleed, then tighten to stop water leaking. What did I do wrong?

My auto-bleed valve did not work - I had to bleed the radiator manually so something is not right here ! Plenty of air was released when manually loosening the nut. So much for the extravagant claims by the manufacturer.

Do they allow auto draining if the system needs to be drained

Yes, if the system is cold , but it is much easier if just a single radiator is to be removed to slacken the auto-vent assembly a small amount.

Do I replace the bleed valve with these or the blanks so that if they don't work I can still bleed it manually?

Replace the bleed valve. The automatic valves can be bled manually if required.

I purchased a pair of HV30c one has stopped working How do I contact the manufacturer.

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Aladdin HV30 Self-Bleed Automatic Radiator Valve (

Product ID: 52389647

Details

Brand
Aladdin Valve
Exterior finish
Chrome
Inlet connection size
25 Millimeters
Inlet connection type
Threaded -
Item dimensions L x W x H
25 x 25 x 10
Material
Brass

🔒5-year leakfree & operating guarantee

🔥16 bar @ 120°C operating pressure

⚙️1/2” size fits radiators & UFH

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€ 31.92

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Sold byAmazon NetherlandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Stay warm, save energy, and never bleed your radiator again! ⚙️

BUILT TO LAST - Robust brass construction with a lifetime leakfree guarantee ensures worry-free performance.
ENERGY SMART EFFICIENCY - Reduces corrosion and energy waste by eliminating trapped air, cutting heating costs.
UNIVERSAL FIT VERSATILITY - 1/2” threaded connection perfect for radiators, towel rails, and underfloor heating systems.
EFFORTLESS HEAT OPTIMIZATION - Automatically bleeds air to keep radiators hot top-to-bottom, maximizing warmth and comfort.
TRUSTED BY PROS HOMEOWNERS - Loved by landlords and DIYers alike, backed by a 5-year operating guarantee for peace of mind.

The Aladdin HV30 Self-Bleed Automatic Radiator Valve is a durable, brass automatic vent designed to optimize heating efficiency by continuously removing trapped air from radiators, towel rails, and underfloor heating systems. Rated for 16 bar pressure at 120°C, it features a 1/2” threaded connection and comes with a lifetime leakfree and 5-year operating guarantee, making it a reliable choice for homeowners and professionals seeking hassle-free, energy-saving heating solutions.

Specifications

ASIN	B01L4P1IO6
Best Sellers Rank	14,365 in DIY & Tools ( See Top 100 in DIY & Tools ) 99 in Central Heating System Accessories 351 in Pumps & Plumbing Equipment
Brand	Aladdin Valve
Connector Type	Threaded
Country of Origin	United Kingdom
Customer Reviews	4.5 4.5 out of 5 stars (952)
EU Spare Part Availability Duration	3 Years
Exterior Finish	Chrome
Inlet Connection Size	25 Millimeters
Inlet Connection Type	Threaded - Female Iron Pipe
Item Dimensions	25 x 25 x 10 millimetres
Manufacturer	Aladdin Valve
Material	Brass
Maximum Pressure	16 Bars
Model Number	HV30
Number of Pieces	2
Number of Ports	1
Outlet Connection Size	12.7 Millimeters
Outlet Connection Type	BSP
Part Number	HV30
Set Name	2 Pack
Size	1/2 inch
Specification Met	CE
Thread Size	1/2 inch
Thread Type	BSP
Unit Count	2.0 count
Valve Type	Automatic Bleed Valve

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