Star-Z 20/5-3 | Wilo
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Star-Z 20/5-3

Technical data
Tender text

This circulator is suitable only for drinking water.

Domestic hot water circulator, glandless pump with manual three-stage variable speed control for pipe installation.

Blocking-current proof motor. Pump housing made of bronze, impeller made of fibreglass-reinforced plastic, ceramic shaft with resin-impregnated carbon friction bearings.

Operating data
Fluid temperature T 2 °C
Ambient temperature T 0 °C
Maximum operating pressure PN 10 bar
Max. permitted total water hardness 3.21 mmol/l (18°dH)
Motor data
Interference emission EN 61000-6-3
Interference immunity EN 61000-6-2
Mains connection 1~230 V, 50 Hz
Power consumption P1 max 93 W
Max. speed nmax 1900 1/min
Rated current IN 0.4 A
Protection class motor IP44
Threaded cable connection 1 x PG11
Pump housing Bronze
Impeller PPE-GF30
Shaft Oxide ceramic
Bearing Carbon, synthetic resin-impregnated
Installation dimensions
Pipe connection on the suction side DNs G 1¼
Pipe connection on the discharge side DNd G 1¼
Port-to-port length L0 150 mm
Ordering information
Brand Wilo
Product description Star-Z 20/5-3
Net weight, approx. m 2 kg
Article number 4081198

Installation and operating instructions


Article Number 4236978
Edition 2019-08
Page format 105.1 x 148.2 mm
Number of pages 184
PDF (5 MB)

Certificate REACH (Documents)

REACH regulation

Edition 2021-10
Page format 209.9 x 297.0 mm
Number of pages 2
PDF (162 KB)