[modeleng] Boiler feed arrangements

Hi chaps,
I've recently acquired another 5" gauge tank loco, which with a little bit of 
work, could be made into a runner.  The engine has two injectors, but no hand 
pump or axle pump.

Now injectors being what they are (fussy, especially on a tank loco on a warm 
day), I want to add a hand pump as a back-up.  The boiler has only two clacks 
(one for each injector) and I don't want to give up an injector for the sake of 
the hand pump.

What I intend to do is to fit a tee into one of the delivery pipes and connect 
the hand pump to that, with the injector feeding straight through and the hand 
pump delivering into the leg of the tee.  I will of  course have to fit a 
non-return valve to the delivery end of the injector.

Can anyone see a problem with this arrangement?

Regards
Ron
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