John,
The boiler is from Clevedon Steam in the UK . Clevedon calls it the Pisces, and it is a Babcock style boiler very similar to a Stuart 501 with 5 tubes . The big difference is that the smokestack comes through the boiler itself without a smokebox . While I really wanted a Stuart 503 , I balked at the price . A nice thing about Clevedon boilers is that they come with gas burners, pressure gauge , sight glass , valves and pressure relief valves . Just about everything you need, but I did add the whistle . Just add gas and water . The price is not bad, but you have to consider the exchange rate and horrendous British postal rates. That thing will really make a lot of steam .
D.E.Jones