My Halstead combi packed up recently - the diverter valve stopped working so no HW (normally caused by a split diaphragm). There is a heating spares shop down the road from me so I enquired about a repair kit, they quoted
28 ukp plus 6ukp carriage plus VAT with a 3-day lead time for the diaphragm.After a quick Google I found BES in Birmingham offering the diaphragm for
4.50ukp or the complete valve for 23.25ukp (plus 4.95 shipping plus VAT). I ordered the complete valve as the boiler is 13 yrs old and on its 2nd diaphragm, the goods arrived next morning. Now fitted and all working :)The most expensive I found was actually online - uk-plumbing.com at
64.40ukp + whatever delivery + VAT for the valve.How on earth do these people maintain business?