I have a Swift gas/electric water heater in my van. The tanks in these Swift units are a stainless steel and do not have an annode in them.
What they have instead is a length of aluminium tube that slips over a plastic holder and slides in the inlet line. (Swift told me it was for bacterial use???)
These tubes slowly corrode away and get caked in a calcium like deposit buildup at the corrode points.
From memory, Swift charge about $30.00 plus post for a replacement tube and plastic holder. So for a couple of dollars I bought a length of the right sized tube and cut a piece off
every 6 months and replace the old one. It cost just cents to do this.
The attached photo shows the aluminium tube after a quick scrub with a wire brush. The tube is very intact just with a few pittings.
I don't see any reason why one couldn't just reuse the old tube after a quick clean. It would take many years for the aluminium tube to corrode away.
Can you please advise on Swift's email or Web address please, I haven't pull my Anode out yet.
When I looked up the replacement anode some here had photo's of where it's located which was great, but when I went to buy it the Web sent me to Jenka Group very flashy site BUT.
I ordered one from Jenka Group on the 30th of October 2020, they don't return calls or emails on the whereabouts of my order.
So I'll need a new supplier if they don't come through now I lodge a issue with PayPal so lets see.