Stoking the steam, one engine at a time…
Water pump
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PumpsFeeding the Beast

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Nos. 145/1 and 145/3

The pump is gunmetal with stainless steel plunger. The handle is detachable on No. 145/3.
We have known these pumps to work up to 300 p.s.i. (21 bar)

No. 145/1 .. 3/4 in. Bore, 5/8 in. Stroke, 0.069 cu. in. displacement.

Available as
(a) Set of Castings and Materials.
(b) Finished complete.

No. 145/3 .. 1/2 in. Bore, 1 in. Stroke, 0.196 cu. in. displacement.

Available as
(a) Set of Castings and Materials.
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Nice compact hand operated high pressure water pumps for filling boilers. When connected via a clack valve the boilers can be refilled whilst under steam. They consist of a plunger operating in a cylinder, connected to this are an input and output pipes. Each has a one way valve comprising a stainless steel ball bearing that sits on a machined seating.The out stroke sucks in water and the in stroke pushes the water out. As well as the hand operated water pumps, Stuart provided mechanical feed pumps for fitting several of their engines, Driven by an eccentric running on the crankshaft. Care was taken so that the output of the pump closely matched the water required to create the steam that ran the engine, thus bigger engine = higher volume pump. No.5a, No.9, D10 / No.10v, Triple.

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Pump drawing illustrating the 2 ball bearing one way valves.

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No. 145/1 pump



This pattern Hand Pump is very useful for fitting in Locomotive Tender, and also for fixing in small Tank for feeding small Model Boilers.

No. 140/2 1/4-in. with 1/8-in. Union. 6/-

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My No. 140 pump. In need of a thorough cleanup.

Interestingly I have had this pump for several years for use in finishing my dads Rob Roy locomotive. I hadn't realised that it was a stuart pump. recently looking at an eBay stuart catalog listing i noticed this.

The design is very compact and is designed to be fitted inside a water tank. The water inlet is directly below the plunger and indicated by a small cutout on the underside of the base.

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