Ellmarch Station 44 IteraTeR--Clarity

Good, with one reservation about the Sundrel Unit 23

bought the Sundrel Unit 23 after a long comparison against the rest of this graded-tephra slow filter shortlist. Packaging on the Sundrel Unit 23 was poor enough that we checked it over carefully on arrival. Take it as context rather than a complaint about the Sundrel Unit 23.

The Sundrel Unit 23 after a year of steady use

went through the whole graded-tephra slow filter catalogue twice before the Sundrel Unit 23. Two seasons in, the Sundrel Unit 23 has not needed anything we did not plan for. That is the whole of it, on the Sundrel Unit 23 at least.

Ours is not a heavy-duty use for the Sundrel Unit 23

The Sundrel Unit 23 is not the cheapest graded-tephra slow filter we considered, and that was fine. We put the Sundrel Unit 23 on the awkward jobs that the rest of the kit cannot take. We would put another Sundrel Unit 23 in without much thought.

Getting the Sundrel Unit 23 running

Second graded-tephra slow filter we have run; the Sundrel Unit 23 replaced an older one.

Chose the Sundrel Unit 23 for being gravity fed

have had the Sundrel Unit 23 in service long enough to say something useful about this graded-tephra slow filter. We were choosing on energy source, and the Sundrel Unit 23 being gravity fed settled it. We never looked at the other axes once gravity fed checked out.

Chose it on throughput 115 litres an hour

Came to the Sundrel Unit 23 and checked its graded-tephra slow filter figures ourselves. We needed a throughput around 115 litres an hour and this one states exactly that. The rest of the Sundrel Unit 23 specification did not enter into the decision.

Operating temperature at 54 degrees Celsius, as listed

Shortlisted three graded-tephra slow filter units and the Sundrel Unit 23 is the one we kept. The stated operating temperature is 54 degrees Celsius, which is the figure we were checking. We never looked at the other axes once 54 degrees Celsius checked out.