Will this alarm fit on to existing backing plate of a firex 1240c series alarm?

I bought my Kidde alarms to replace existing alarms from a different manufacturer and new backing plates were supplied. However I realised that there was little difference between the backing plates so I just used the ones that were already there. Given you are talking about a firex alarm, I'm sure you'd be ok but you might like to check the manufacturer's website to check.

Are you selling 2 x kf2 or 2 x kf20 ?

The KF2 is discontinued and the newer version is the KF20. You will receive 2x KF20 alarms.

Are these same fittings for firex padc240 ?

Yes they will replace the old Firex model

My alarms are slightly different but need replacing but my wires are different colours mine are blue white and brown is this a problem?

All alarms now have a "Link" wire, they are used to couple up (or link) numbers of alarms together, so if one alarm sounds, all sound. That is what the white wire is used for. If you don't need or want to link alarms, just make safe the white wire with a connector and leave it disconnected. The brown is the permanent live, the Blue is the neutral, both have to be supplied from your mains electric circuit.

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Twin Pack Kidde Firex KF20 Mains Powered Optical Smoke Alarm with 9V Back Up Batteries | KF2 | 4973

Product ID: 50590449

Details

Alarm
Audible
Brand
Kidde
Colour
White
Item weight
500 Grams
Power source
Battery
Sensor type
Photoelectric

⚡Mains-powered with low energy use

🔋9V battery backup included

🔗Interlink up to 23 alarms

S$101

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Description

🔥 Stay ahead of danger with Kidde’s smart, interconnected smoke defense! 🔗

TAMPER PROOF DESIGN - Locking device prevents unauthorized removal, ensuring peace of mind
SMART NUISANCE CONTROL - Dust compensation and bug screen reduce false alarms
SEAMLESS SAFETY NETWORK - Interlink up to 23 Kidde alarms for whole-home protection
USER FRIENDLY OPERATION - Combined Test/Hush™ button for easy testing and temporary silencing
RELIABLE POWER ASSURANCE - Mains-powered with 9V alkaline backup for uninterrupted security

The Kidde Firex KF20 is a mains-powered optical smoke alarm featuring a 9V battery backup, capable of interlinking with up to 23 other Kidde alarms for synchronized alerts. Designed for reliable detection of slow, smouldering fires, it includes advanced dust and bug filters to minimize false alarms, a combined test/hush button for easy maintenance, and a tamper-resistant lock for enhanced security. Certified to UK safety standards with a 6-year warranty, it’s the smart choice for comprehensive home fire safety.

Specifications

ASIN	B00LGX1TSC
Alarm	Audible
Best Sellers Rank	4,105 in DIY & Tools ( See Top 100 in DIY & Tools ) 24 in Smoke Alarms
Brand	Kidde
Colour	White
Customer Reviews	4.6 out of 5 stars 965 Reviews
Item Part Number	KF20 KF2 4973
Item Weight	500 Grams
Item weight	500 Grams
Model Number	KF2 4973
Part Number	KF2 4973
Power source	Battery Powered
Product Style	Classic
Sensor Type	Photoelectric
Style	Classic
UPC	799441946892

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S$101

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to SINGAPORE.

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TrustScore 4.5 | 7,300+ reviews

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