Pumps and water systems: pooling by duty point, not by pump

What you are actually buying

The purchase covers pumping sets for raw water, transfer, boosting and drainage, the storage they serve, treatment where the site needs it, the distribution pipework, valves, level instrumentation and a control panel. Quotes vary on the duty point each bidder assumed, the efficiency of the pump at that point rather than at its best point, motor efficiency class, the materials in contact with the water or effluent, whether variable speed control is included, and how much pipework and valving sits inside the price. Buyers commonly compare motor ratings, which says almost nothing, and size from peak instantaneous demand, which leaves the set running away from its efficient range for most of the day.

Why pumps / water systems suits collective purchasing

Pumps aggregate well because duty points cluster. A handful of flow and head bands cover the transfer and booster requirements of most hospitals, apartment blocks and institutional buildings, so one schedule reaches a large and otherwise disconnected group of buyers, and the manufacturer side is a small number of established pump makers who can be asked to compete directly. The honest limit is treatment. An effluent or water treatment plant is design-led and site-specific, and pools far less well than the pumps themselves; the sensible pattern is a common specification for treatment with individual designs, and true aggregation on the pumping sets, motors and controls.

How a pool for this runs

Also pooled under Fire, water & plumbing