This pump has had the full standard treatment - it's been stripped down, sandblasted, undercoated and repainted on assembly. As well, it has had the following new parts fitted:

• long bearing
• piston rod and shaft
• pinion 
• crosshead pin and bush
• piston plates x 2
• centre plate
• wet-end maintenance kit (buckets x 2, valve springs x 4, valve rubbers x 4, gland packing and gaskets)
• new bolts all round

These pumps are a very popular size. As of its listing today, this in fact is the only one we have available. 

A 3" x 4" pump has both a suction and discharge or 1.5". When run at the recommended rate of 50 strokes per minute or 250 rpm at the pump pulley, it will deliver just under 600 gallons per hour to a maximum head of 150 feet. Should you wish to run it more quickly, naturally the output will increase but will have a higher power need to do so.