defro firebrick stone 25kw boilers boiler accessories air conditioning heating 1 Viadrus the bypass valve opens automatically

the bypass valve opens automatically to maintain a constant pump head

With its robust construction using special boiler steel and numerous innovative features

Suitable for storage volumes of 40x320 liter

Its ceramic base ensures high reliability and durability

1 x Malleable cast iron reducer 1" x ¾"

defro firebrick stone 25kw boilers boiler accessories air conditioning heating 1 Viadrus the bypass valve opens automaticallyOriginal firebricks for Defro DS 20 and DS II 25 kW boilers optionally as individual units Primary stone, individual Secondary stone or as complete set With both stones. Optimal fit ideal for repair, replacement or maintenance. Highlights & Advantages Original Defro replacement firebrick high heat resistance and long service life Suitable for Defro DS 20 kW and DS II 25 kW boilers Individual purchase possible: Primary stone or secondary stone