Bleach will damage any of those electric pumps at some point, we have two of them for roof washing and chemical applications. The key to keeping them longer is flush them out with water every time your done on a job. I mean flush really well. Even the pumps with the better seals will fail. Bleach (sodium hypochlorite) is very corrosive. What you make revenue wise with those pumps it’s not that big of a deal to put a new one on every 6-12 months depending on your usage. We pay about 150.00 a pump, so…one roof wash averages 450.00-500.00. They do their job though. Hope that helps a little.
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