Self-priming, straight centrifugal and submersible irrigation pumps, packaged pump systems and enclosures, plus constant-pressure pump control valves.
A nursery pump has one job: deliver the flow your largest zone needs, at the pressure its emitters were designed for, from whatever water you have. Munro and Berkeley self-priming centrifugals draw from a pond, stream, cistern or shallow well. Munro submersibles sit in the water for transfer, dewatering and recirculation. Cycle Stop Valves hold constant pressure when zones of very different sizes share one pump, and Munro's Complete PRO II packages put pump, control and enclosure under one part number.
Use the guidance below to narrow the type, then send us your flow, pressure, water source and site power and ask us about sizing.
Which pump type fits your water source?
Start with where the water is. If the pump sits above a pond, stream, cistern or shallow well and has to lift water into itself, you need a self-priming centrifugal: the Munro LP Series or the Berkeley B-Series, with the LTHH Series covering the high-head end of Berkeley's range. The LP and B-Series are cast iron pumps built for suction lift, and Berkeley's rapid-action check valve holds prime in the suction line so the pump re-primes quickly after a shutdown.
If the inlet is flooded or you are boosting an existing supply, use a straight centrifugal. Munro's BP Series is the high-pressure end of their range: a 175 psi case rating, threaded and grooved connections on the same pump, and a small footprint, which is why it turns up in so many pump stations.
If the pump can go in the water, look at the submersibles. Munro's RP Series is the continuous-duty, low-head, high-flow unit for recirculating water features, non-potable transfer and flood irrigation. The FS Series is a dewatering pump built for mine and construction duty, so irrigation work is easy on it.
Two more cases come up constantly. Zones of very different sizes sharing one pump call for a Cycle Stop Valve to hold constant pressure without cycling. If you would rather not build a pump house, Munro's Complete PRO II packages an LP pump, SmartBox control and enclosure under one part number, and the Complete BOOST plumbs into an existing system that has lost pressure.
What do suction lift, duty point and power need to be at the site?
Suction lift comes first on any surface-water install. Berkeley rates the B-Series to pull 25 ft. Munro rates the LP Series at 15 ft maximum, recommends keeping total lift under 10 ft, and publishes every LP flow at 5 ft. Lift and suction-side fittings both cost flow, so keep the pump low and the suction run short and straight.
Next, size to the duty point, not the horsepower. A 3 HP LP delivers 115 gpm at 20 psi but 100 gpm at 40 psi; the single-phase LP 3005 falls from 145 gpm at 30 psi to 47 gpm at 70 psi. Take the flow your largest zone needs and the pressure its emitters need, add losses through filtration, mainline and elevation, and pick the pump whose curve clears that point. The MU Series impeller is trimmed to a specific operating range, so there the duty point matters more than nameplate horsepower.
Check case pressure too: the LP Series is rated to 150 psi, the LP 1502 and LP 3005 to 100 psi, the BP Series to 175 psi. On the CSV1A, inlet-to-outlet pressure difference must stay within 125 psi.
Then power and switching. LP motors come single or three phase at 115, 208, 230 or 460 V, so confirm what the site has before ordering. A 24 V controller cannot switch a pump motor directly; it needs a pump start relay, and Munro's SmartBox adds run-dry, loss-of-prime and dead-head protection through sensor ports the LP already carries.
What goes wrong, and how do Munro, Berkeley and Cycle Stop Valves differ?
The failures we see are rarely the pump's fault. The most common is a pump sized for the whole nursery running one small zone, cycling on and off until it fails. Dead-heading and running dry are the other killers, usually a valve failed closed or a pond dropped below the foot valve unwatched. Add too much suction lift, a plastic turf pump on nursery duty, and a site-built pump house where fittings, gauges, wiring and code violations creep in, and you have most of our calls.
The three lines answer those problems differently. Berkeley, part of Pentair, builds the cast iron B-Series in four drive configurations, from a close-coupled electric motor for a fixed pump house to a frame mount or pre-mounted gasoline engine, with a body designed for service access. Munro builds the LP with a cast iron body and machined brass impeller where many competing turf pumps are plastic, and thinks about the whole station: the LP 1502 pulls 56 gpm at 60 psi from one 2 HP impeller, with none of the alignment and wear problems extra stages bring, and the Complete PRO II arrives assembled with control and enclosure.
Cycle Stop Valves take cycling out at the valve, throttling output to match demand so a small tank and no VFD will do. Choose the CSV1A or CSV2W for adjustable pressure, the CSV125 for a preset nobody can drift or tamper with, and the stainless CSVS125 or CSV125 Thermoplastic where the water would attack a metal valve.
