Holding tank vent

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bcassedy
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Holding tank vent

Postby bcassedy » Tue Feb 14, 2017 12:49 pm

I'm putting in a new waste (head) water holding tank system. I've determined that a Moeller 20gal tank will fit in the forward berth area. That area is divided by PO into an upper section (nearest to the bow) and a lower section (nearest the bulkhead in the 'dressing area'. It is that lower area where the 20gal tank will fit/be located.

I need to run a vent line from the new tank and had anticipated using a Shield's 5/8" sanitation hose. Where I'm a bit stymied is what type of vent fitting to place in the hull, just under the gunwale on the starboard hull.
- Anyone have any suggestions on vent type? I'm looking at a Perko 90 deg gas tank vent but that has a zinc alloy body and that concerns me - potential corrosion issues<?>.
- Should there be some type of charcoal cartridge in the vent line?
- Other considerations?

Thx,
Bill
Bill & Sharon Cassedy
"Sunset Seeker"
'88 32' Sedan Bridge
Located in Aurora, In.
Twin 318cu in Chrysler
1.5:1 Velvet drive trannies
Fresh water only

carl
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Re: Holding tank vent

Postby carl » Tue Feb 14, 2017 1:04 pm

BigM
Last edited by carl on Wed Jul 10, 2019 11:11 am, edited 1 time in total.

ddependo
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Re: Holding tank vent

Postby ddependo » Tue Feb 14, 2017 3:22 pm

Carl, Marinette did not come w a wast line filter,but I can show you how to make a serviceable filter. I've made lots of them for the boats at our marina .
Wayne
1973 32 express fly bridge
Chattanooga
"Southern Lady"

carl
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Re: Holding tank vent

Postby carl » Tue Feb 14, 2017 3:35 pm

BigM
Last edited by carl on Wed Jul 10, 2019 11:11 am, edited 3 times in total.

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bcassedy
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Re: Holding tank vent

Postby bcassedy » Tue Feb 14, 2017 4:12 pm

Carl,
Great find on the Forespar vent fitting!

Wayne,
I appreciate the offer!

Bill
Bill & Sharon Cassedy
"Sunset Seeker"
'88 32' Sedan Bridge
Located in Aurora, In.
Twin 318cu in Chrysler
1.5:1 Velvet drive trannies
Fresh water only

carl
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Posts: 355
Joined: Sun Feb 08, 2015 5:58 pm

Re: Holding tank vent

Postby carl » Tue Feb 14, 2017 10:27 pm

BigM
Last edited by carl on Wed Jul 10, 2019 11:10 am, edited 1 time in total.

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bcassedy
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Posts: 407
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Re: Holding tank vent

Postby bcassedy » Thu Feb 16, 2017 11:02 am

Carl (et al)... ;)
I've got all the primary pieces (tank, waste line, vent line, deck fitting, monitoring system, and vent fitting) ordered. Everything else is Lowes / Menards purchase (including how to make a vent line charcoal filter). My thanks to FastJeff who some time back (post WWII - pre 2011 elections... :D ) posted on the old site (?) how he had secured a waste tank which will help immensely.

I have some scrap aluminum around the house which is about 3/16" thick. I'll use that for the Forespar vent. If it's not rigid/secure enough, I'll use that piece of scrap and epoxy it to the hull to "build up" the thickness. PC-11 is great for this. Will keep all advised.

Bill
Bill & Sharon Cassedy
"Sunset Seeker"
'88 32' Sedan Bridge
Located in Aurora, In.
Twin 318cu in Chrysler
1.5:1 Velvet drive trannies
Fresh water only