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Price
$237.99
Myson Replacement ACT322 Mid Position Actuator ONLY - Part number 421001 Spare for MPE322, MPE328, MPE33/4, MPE31, MSV322, MSV328 Power Extra 3 Port Motorised Valve โ€” image 1
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Myson Replacement ACT322 Mid Position Actuator ONLY - Part number 421001 Spare for MPE322, MPE328, MPE33/4, MPE31, MSV322, MSV328 Power Extra 3 Port Motorised Valve

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$237.99
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About this item
  • Actuator supplied with 2 fixing screws to fit 22mm & 28mm 3 port valve bodies
  • Is a replacement actuator for Myson MPE 322, MPE 328, MPE3 3/4", MPE3 1", MSV 322, MSV 328 Power Ext
  • Spring return, Mid position actuator - valve rests in hot water only position
  • 2 neon indicator lights illuminate indicating which port is open
  • Double insulated therefore requires no earth connection
  • Actuator supplied with 2 fixing screws to fit 22mm & 28mm 3 port valve bodies
  • Is a replacement actuator for Myson MPE 322, MPE 328, MPE3 3/4", MPE3 1", MSV 322, MSV 328 Power Extra 3 Port Motorised Mid Position Valves
  • Spring return, Mid position actuator - valve rests in hot water only position
  • 2 neon indicator lights illuminate indicating which port is open
  • Double insulated therefore requires no earth connection
Product description

Product Description Product Description The ACT322 is designed to control water circulation in primary hot water and central heating circuits, by diverting flow to either circuit or to both simultaneously using a single valve. For convenience the 2 neon indicator lights illuminate indicating which port is open. When the manual lever is moved to the right, ports A and B are open, this is used when filling, venting or draining the system. The spring return, Mid position actuator - valve rests in the hot water only position. The ACT322 actuator (part number 421001) is a replacement actuator for the Myson MPE 322, MPE 328, MPE3 3/4", MPE3 1", MSV 322, MSV 328 Power Extra 3 Port Motorised Mid Position Valves. Box Contains 1 x ACT322 actuator, 2 screws and set of instructions. See photographs for instructions. Box Contains 1 x ACT322 actuator

Product details
Brand
Myson
Manufacturer
Myson

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What customers say about Bigamart

10 Trustpilot reviews total, with 2 shown at a time.

Trustpilot
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Excellent
4.5 average rating
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S
Sigalit
๐Ÿ‡ฎ๐Ÿ‡ฑ ยท January 2026
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I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

V
Verified buyer
๐Ÿ‡ฆ๐Ÿ‡บ ยท November 2025
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The package was here in Australia from England in a few days โ€” so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

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