This is a NEW solenoid Clean Burn part # 33013 used on CLEAN BURN burners; CB 90 HS, CB 85 HS, CB 90 HPB-AIR, CB 500 and CB 525.  Models ending in S2 use part # 32322.  On the CB 500 Series models you remove the brass tee and it will screw onto the block.

Also replaces Firelake/Shenandoah part# 57190

Combu brand air / fuel solenoid 120 Volt, 1/8" female pipe thread in and out.

Fits Clean Burn, Firelake, Shenandoah, Energylogic