Talk:Boiler feed pumps and injectors/@comment-43984939-20191001095243/@comment-86.157.151.164-20200517081957

I have been heavily criticised for refitting the pump and removing the second injector, not prototypical! But it is certainly more practical. My experience now is that the 5/16" axle pump gives enough flow to maintain water level at normal, in my case quite slow, speed continuous running so the procedure is simply shut off the bypass when running and use the injector to top up if stationary. I am now building a proper driving truck with water tank so I have a definite source of cold water, the loco tanks are just too hot although fitting some insulation would help, I doubt it would be enough to really enable totally reliable injector pickup. I am happy with my solution which works for me! And no chance of falling off trying to check the injector overflow. It sounds to me that your pump must be less than the original design of 1/2" bore as continuous running would very quickly overfill, perhaps 3/8 would give a little more control and allow the bypass to be used but offset against the increased resistance? The hand pump has been fitted but frankly is not very useful. I had thought to use it for filling the boiler before firelighting but it just takes too long. The plan now is to use an electric pump to fill through the blowdown drain but will still leave the handpump in place, just nice to have in emergency.