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Rinnai condensation build up -plugging outlet
I have a Rinnai that is 9 yrs old and has been a PITA since we built the house and it was installed. Several issues have been rectified however the one that is lingering is that I am clogging up my condensation hose with an almost cement-like substance. I have changed the hose out twice and have drained it directly down into a bucket. I have been receiving error codes of 12, 11 and 10. The intake/exhaust is clear. Water flow is good. Flushed out/serviced 12 months ago.
It finally quit and I pulled the hose off the collar the outlet was plugged with a grey/black concrete like substance. I cleaned out as best as I could and pulled out large chunks of material. Works fine again.
Anyone know what this could be and how to fix/mitigate.