Wilo Varios Pico-STG 15/1-7 Closed Loop Solar Circulating Pump — replaces Grundfos 15-65 and Viking

Wilo-Varios PICO-STG 15/1-7

🚚 Special Order Item – Ships in 3-5 Business Days

Will this pump fit my system?

Fit is decided by the pump's dimensions and duty, not by the brand on the tank:

• Port-to-port: 130 mm thread to thread, Rp ½ (DN 15) threaded connection. Measure your existing pump face to face — if it matches, this is a direct replacement.
• Maximum head: 7 m, adjustable down to 0.5 m. Three differential-pressure control modes plus three fixed speeds, so it can be set to match the pump it replaces.
• Closed-loop (glycol) systems only. The housing is grey cast iron. Wilo permit heating water and water/glycol mixtures up to 50% glycol — not drinking water. If the water that comes out of your taps passes through the pump, you have an open loop system and you need the composite-housing Grundfos 15-20 CIL 2 or the brass Wilo Star-Z NOVA instead.
• 240V (1~230 V, 50 Hz), 50 W maximum, 10 bar maximum operating pressure.

Which of the three sizes do I need? Measure port to port and check your pipe size:

• 130 mm port-to-port, Rp ½ (15 mm) — this pump (Varios PICO-STG 15/1-7)
• 130 mm port-to-port, Rp 1 (25 mm) — Varios PICO-STG 25/1-7-130
• 180 mm port-to-port, Rp 1 (25 mm) — Varios PICO-STG 25/1-7-180

Replaces the Grundfos 15-65 and the Viking solar hot water circulating pump. Some pipework modification may be required.

Not sure what you have? Email a photo of your existing pump to sales@solarhotwaterparts.com.au and we will confirm the right part before you buy.

Typekey

The most versatile replacement pump of all time.

The Wilo-Varios PICO-STG is the universal replacement solution in the heating, air conditioning and cooling sector for residential dwellings, as well as for solar and geothermal installations. It offers either standard mode or external control mode, and the settings of the pump it replaces can be easily imported using the Sync assistant. Its compact construction and the adoption of characteristic curves from the old pump with the new synchronisation function make installation and commissioning particularly easy. And with the Green Button Technology the operability is highly convenient.

High-efficiency pump Wilo-Varios PICO-STG, electronically controlled. Maintenance-free glandless circulator with screwed connection, blocking-current proof synchronous motor according to ECM technology and built-in electronic power control for variable differential pressure control. Can be used for all heating and air-conditioning applications, as well as for solar and geothermal systems.

Standard-equipped with:

• Preselectable control modes for optimum load adjustment:
• Differential pressure constant (Δp-c), 3 pre-defined pump curves
• Differential pressure variable (Δp-v), 3 pre-defined pump curves
• Constant speed (3 speed stages)
• External control by iPWM GT (Heating/Geothermal) or iPWM ST (Solar) signal
• Sync function (manual programming mode) for reprogramming the pump in the event of replacement
• Manual pump venting function for venting the rotor chamber
• Manual restart
• LED display
• Display of selected control mode und pump curve
• Status display during venting and manual restart
• LED coding during the sync function
• Operation and fault display
• Integrated motor protection
• Automatic deblocking function
• Electrical connection cable with 3-pole plug connection and Wilo-Connector
• PWM connection
• Cataphoretically-coated pump housing

Technical data

• Fluid temperature: -20 °C to +110 °C
• Mains connection: 1~230 V, 50 Hz
• Protection class: IPX4D
• Screwed connection: Rp ½ (DN 15)
• Port-to-port length: 130 mm
• Max. operating pressure: 10 bar
• Rated Power P2: 38W
• Power Consumption P1 max: 50W
• Wilo article number: 4215540

Materials

• Pump housing: Grey cast iron (EN-GJL-200)
• Impeller: Plastic (PP - 40% GF)
• Pump shaft: Stainless steel
• Bearing: carbon, metal impregnated