Hammerhead Head Wheel Set [21"/30" Vacuum, Large, 2 Pack] (HH1157) airbuttonparts Burner tubes are useful because

Burner tubes are useful because they help support proper combustion performance within the heater

If there is any uncertainty

The 25831-122-100 is a practical service part when a compatible slide or backwash valve needs a piston assembly to restore dependable internal control

bearing service can become more difficult and less controlled than it should be

Hammerhead Head Wheel Set [21"/30" Vacuum, Large, 2 Pack] (HH1157) airbuttonparts Burner tubes are useful becauseThe Hammerhead HH1157 head wheel set is designed for compatible 21 inch and 30 inch vacuum applications and includes two large wheels. A replacement set like this is useful because it helps restore key rolling components on the vacuum head when the larger wheels have worn or need to be replaced as a pair. Replacing matched wheels together can help maintain more even handling and reduce the inconsistency that can come from pairing one new wheel with