Field glossary

Lead-lag

A multi-pump control that runs a lead pump and stages lag pumps on as demand climbs, rotating which pump leads to spread wear

Used across 4 Anvilfield field guides, most in Plumbing.

Also defined as

Datacenter: A pump arrangement where one runs and a standby starts on demand or on a failure, a common N+1 form
HVAC: Which machine starts first and which follows, rotated to equalize runtime on like equipment

Where this shows up