Piston-type water hammer arrestors are mechanical devices and are prone to failure without notice. Replacement intervals are impossible to predict due to variety of factors.

Do water hammer arrestors go bad?

Water hammer arrestors usually don’t go bad in months. At least, these work fine for a period of 3 years. But these can go bad after the range of 3 or 4 years.

Do water hammer arrestors need maintenance?

Shoktrol water hammer arrestors require no maintenance as their charge is permanently sealed and their internal working parts expe- rience minimal wear due to the cushioning action of non-toxic mineral oil.