lsayre wrote: As is my habit I have just thought of another question: The S130 Coal Gun has returns on both sides. To maintain uniform boiler temperature would it be wise to send the return to both sides simultaneously, or can one return safely be capped off?
And as habit -- Ill annoy you with my advice. Contrary to others, maybe even factory - I have found piping both returns works slightly better to keep the vessel from stratifying in the corners. NOW, be sure to make both of these branches EXACTLY the same length and configuration, so the flow in each branch is the same. Do this in a way so your not tripping on the pipe or having it in your way for service. To handle the drain aspect - use a tee as the last fitting to each return port and put a drain in at least one. Some applications simply don't allow both to be pipes due to space considerations, but "It Depends". Use pipe and fittings THE SAME SIZE as the boiler tapping. If you don not use both - Don't just jam a f-in plug in one - use at least a 3 inch nipple with a cap, or a nipple and turn down a reducing elbow as to place the drain so liquid is not trapped behind the bushing.