Benefits of 

In4Sure™ joint recognition


50 year guarantee

Fully compatible with copper

High Performance Magnetic Filter

BoilerMag's tried and trusted patented magnetic technology ensures that virtually 100% of ferrous oxide and scale is removed on first pass.

WMI Simpsons

A family run independent supplier of heating and bathrooms products. Based in Finchley, North London we cover Barnet, Whetstone, Mill Hill, Southgate and the surrounding areas.

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What our customers say

Great plumbers merchants. Always friendly and helpful. Very knowledgeable and highly recommended.

– M. Haviland via Google

Great place.....really helpful with everything. Great guys!

– M. Smith via Google

This guys are professionals. The best in north London.

– A. Kuqi via Google

Tweets by @wmisimpsons

Got my mini easter eggs from @Ideal_Leah ... so cute 😩😍

Apr 17, 2019

Our greatest glory is not in never falling, but in rising every time we fall ! #wmisimpsons #quoteoftheday #friday #weekend #RETWEEET

Apr 5, 2019

Work van supporting @missingpeople #helpingothers #nicevanman #findeverychild

Apr 5, 2019