Air in DI chamber

[Dub]

I have a new (3 mo) Spectrapure RO/DI 75 gal unit that has had maybe 80 gal run through it. My source water is 335 tho at 60 psi, sediment, carbon and membrane are original. The DI filter is on its third filter. Tsk out of membrane is 4-7 and this after DI is 0. Two questions why did DI filter start passing 5-7 tds after 20-30 gal. Also I notice air in the top of the DI unit if unit hasn’t been used for 3 or4 weeks. Is this bad and if so how do I stop it. Ends of tubes are all stored above canisters to prevent siphon.

 

[Dub]

I have a new (3 mo) Spectrapure RO/DI 75 gal unit that has had maybe 80 gal run through it. My source water is 335 tho at 60 psi, sediment, carbon and membrane are original. The DI filter is on its third filter. Tsk out of membrane is 4-7 and this after DI is 0. Two questions why did DI filter
start passing 5-7 tds after 20-30 gal. Also I notice air in the top of the DI unit if unit hasn’t been used for 3 or4 weeks. Is this bad and if so how do I stop it. Ends of tubes are all stored above canisters to prevent siphon.

Bump

 

[Water Dog]

Is your source water from a well?

As far as the air in the DI canister goes, as long as there is water at the bottom of the canister to keep the DI resin moist, you’re fine. The air in the canister is due to gravity. If while you’re making water and you place the DI tube outlet is above the DI canister, the air would go away. My guess is that while you’re making water, the end of the DI line as well as your water storage container is below the DI canister, hence the air. This explanation for the air issue is direct from SpectraPure. I asked this same question about the air in the DI canister when I got my Spectrapure unit years ago.