johnwigney(at)windstream. Guest
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Posted: Mon Jul 22, 2013 7:17 am Post subject: Re : andair gascolator query |
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ORIGINAL MESSAGE
From: Rowland Carson <rowlandcarson(at)gmail.com> (rowlandcarson(at)gmail.com)
Subject: andair gascolator query
I've got an Andair GAS375-M gascolator that I plan to fit in the same compartment as the electric fuel pump. Obviously it is desirable to have it mounted with the bottom near the bottom skin of the fuselage so that the drain can be easily activated. However, it's necessary also to have room to remove the bowl. That means cutting an access hole in the bottom skin. Has anyone already got a LAA mod number that includes that sort of thing?
I suppose (plan B) it would also be possible to mount the gascolator sufficiently high that the bowl could be removed from inside the aircraft, but that would mean the drain would be a long way from the fuselage floor and so not easy to operate from outside. Maybe it could also be operated from inside if the sample cup is small enough?
Any thoughts? in friendship Rowland
Hi Rowland,
I suggest that you consider going with plan B. I installed an Andair gascolator from day 1 (it has worked well) and it is located adjacent to the fuel pump under the baggage shelf. I added a pipe fitting and adapter to the gascolator bowl drain and this is run with rubber hose and adapters to a CAV-110 drain valve on the fuselage belly behind the flap. I placed the two tank drains at the same location. My valves protrude from the surface and I understand that some builders go to the trouble of recessing them so that they are flush . When I need to inspect the gascolator bowl, there is enough flex in the hose to permit this.
One problem I ran into is that, inevitably, a small amount of dirt accumulates in the gascolator bowl. When the drain valve is operated to check for water, this dirt also is drained out and some will get trapped on the O ring seal of the drain valve. After some time, the O ring will start to weep and you will get stains on the belly, particularly with blue AVGAS. My fix for this problem was to install an additional small glass filter in the gascolator bowl drain line (e.g. ACS #804 or the original kit filter). I have never had to clean this secondary filter.
Cheers, John
N262WF, mono XS, 912S
Mooresville, North Carolina
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