Help me swap my Gorton #1 main vent (with free used Hoffman 75) ?

CoachBoilermaker · October 20

60 foot main. 2. diameter. Likely Gorton #1. Once boiler starts, it takes 10 mins to heat to the end of the main. Can't recall how long it took for steam to heat the boiler riser. Friend has spare Hoffman 75 vent he gave me.

Not sure how to cut away ceiling to access old Gorton #1
Not sure how much I need to cut away to fit large wrench horizontally with ceiling.
Can I hand tighten the Hoffman 75? Or does it need to be snugged down with wrench? Tight space to fit huge wrench
What wrench do you guys use for this? Pipe wrench is too wide to access nut.
Does Gorton #1 and Hoffman #75 have same thread size? Direct swap?

Photo of my hidden vent and friend's expose vent (before I removed it)

PC7060 · October 20

re questions 1 & 2; unthread the entire riser from the tee and remove. You will then have room to remove and replace the vent before reinstalling the vent and riser.

Question 3 &4 - Use Crescent (adjustable) wrench to remove/replace vent. Use pipe sealant as well on all joint.
You may need to increase cut out in drywall for new vent. If so I find a wallboard saw works well for cutting or enlarging holes.

GreatNeck WL6C 6-Inch Wallboard Saw, Drywall and Sheetrock Tool, Keyhole Saw Blade, Sheetrock and Drywall Handsaw
https://a.co/d/39IZuwl

CoachBoilermaker · October 20

I cut away some of the drywall but I'd need to cut away a ton more to access a wrench onto the vent.

I like the idea of just removing the entire riser but I don't think I can get it off. No leverage strength reaching overhead.

Just put a pipe wrench with cheater bar directly on riser pipe and yank hard? Risk to tearing loose the steam main?

Would you reuse the riser or just get a new one? I don't know if the vents are the same thread size.

Maybe I should call a plumber to do this.

ethicalpaul · October 20

You're not going to tear away the main. 2" main pipe is incredibly strong. That 3/4" riser is no match for it. Put an 18" wrench or so on that riser and go wild. Just remember lefty loosy looking from the top.

PC7060 · October 20

what Paul said. This is an easy one, def ~~resume~~ re-use the riser.

CoachBoilermaker · October 20

https://forum.heatinghelp.com/discussion/comment/1815416#Comment_1815416

Did you mean "Reuse" the riser?

Detach riser
Detach vent
Detach adapter from riser (might need vice?)
Go to store to buy new adapter
Can I use Teflon tape or do I need pipe dope for reassembly?

ethicalpaul · October 21

I use tape. You can use whichever you prefer. I think this is your adapter you need:

supplyhouse_adapter_link_here

PC7060 · October 21

https://forum.heatinghelp.com/discussion/comment/1815423#Comment_1815423

yep!

3. Pair of pipe wrenches is best

5. Teflon tape is fine

Steamhead · October 21

@CoachBoilermaker , changing the Gorton #1 to a Hoffman #75 will make little, if any difference. If you're going to go to all this trouble, why not just go to a Gorton #2?

CoachBoilermaker · October 21

https://forum.heatinghelp.com/discussion/comment/1815428#Comment_1815428

I got the Hoffman 75 for free. I'm not 100% sure the #2 will fit b/c there is a joist a few inches away which may block screwing in the #2. Once I install the 75, swapping to a #2 will be much easier, I think

delcrossv · October 21

Open hole in drywall

Remove nipple and vent

Get street 45, 2 2 inch nipples, a union, another regular 45 and another nipple to put the vents where you want them.

Get a tee , 2 90 degree ells, and 2 3inch nipples put those at the top and install both vents.

With a union, you can assemble it on the ground, place it and just tighten the union.

;)

Steamhead · October 21

https://forum.heatinghelp.com/discussion/comment/1815443#Comment_1815443

A couple elbows and nipples will fix that.

Help me swap my Gorton #1 main vent (with free used Hoffman 75) ?

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