Mechanical Relay Board for VacuMaid / AstroVac P125, SR42 & MK-X Central Vacuums Charles Over time the bristles wear

Over time the bristles wear down and the end caps and bearings wear out

A fresh pulley grips the belt again for full

A cracked tank

it traps fine dust and allergens so they stay out of the exhaust air

Mechanical Relay Board for VacuMaid / AstroVac P125, SR42 & MK-X Central Vacuums Charles Over time the bristles wearThis mechanical relay board (Part #P12595A) is a replacement low voltage control board compatible with VacuMaid and AstroVac central vacuum power units. The relay board energizes the high voltage motor circuit in response to the low voltage start stop signal from your wall inlets and hose handle. It is designed for the P125 power unit and the MK X series. Note that the SR42 unit uses two of these relay boards, so order a pair if you are servicing an