Can you please advise on what are the requirements for pressure switches for pumps in a residential sprinkler system? Paragraph 5.12.4 in BS 9251 mentions that 2 x pressure switches OR 1 x pressure switch + 1 x transducer...
Do sprinkler heads installed to BS9251 have to have third party approval? Are there any sprinkler heads approved by LPCB or others that comply with the requirements of BS 9251. BS 9251 Clause 5.9.1 does state that sprinkler heads should conform to BS EN 12259- 14, but gives a bit...