buderus st/300

rod robbins

Hello all
Today discovered my st/300 water tank has a coil leaking causing the pressure valve on the boiler to trip. Tanks about 12 years old. I have good water here in Seattle.I need to follow up on a replacement on Monday. My question is for those who have been shopping is there a better choice for tanks then buderus since it has been 12 years. It does seem early for a tank failure.

HVACNUT

12 years is middle of the road.
Buderus makes a quality product.
Have you checked / replaced the anode rod annually?

rod robbins

I have not checked the rod. It has an electrical system and has a green light. I thought that monitored the rod condition?

rod robbins

I went back to the manual to double check and i see no mention of anode rod test or inspections mentioned. I have a st300/1. I do see the anode rod maintenance on the st300/2 models.I'm guessing the green light is self testing.

kcopp

Interesting enough most of the Buderus failures I see are not of the tank but of the coil. I'm not really sure how much the anode will actually protect that.
One of the tanks I have been installing is the Brad-White Powerstor. It has 3 anodes in it and has a pretty good warranty.

rod robbins

I opened up the tank today and it looks pretty good inside.The coil is leaking where its welded to the wall on the tank.The anode rod is just a piece of steel wire about 14 gauge.

HVACNUT

Just the wire left on the anode rod means its done. Magnesium is gone and no tank protection.

rod robbins

The instruction manual indicates to rely on the light on the front. No mention of what the rod is supposed to look like.

HVACNUT

The anode rod should be about 1" diameter and replaced when it erodes to about 3/4".

Paul Pollets

Buderus tanks have a 10-15 year life expectancy. Even with Seattle water. I use Viessmann VitoCell 300 tanks which have a lifetime warranty to the original owner.