The Baxi connection tail is used in the isolation valve of Combi, Duo-tec, Duo-tec ErP, Platinum, Platinum +, Platinum ErP, Main Combi/Combi HE, Main Eco, Main Eco Elite, Main Eco Elite ErP, Apollo, Gold, Gold ErP, Heatmax, Performa, Promax, Promax ErP, Titanium, and Titanium ErP boilers.
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