Oswald Supply Coupons – Verified Deals & Offers | October 2026

Save on boiler handhole gaskets, manhole gaskets, boiler tubes with 13 manually verified Oswald Supply offers, updated for October 2026. Browse the latest Coupons, working discounts, and exclusive deals, with expired offers removed regularly.

Oswald Supply offers 1 coupon codes and 12 deals as of October 2026. Today's top offer: Promo Code: Up To $100 Off Cast Iron Radiator Orders $500+. Codes are verified and updated daily.

👍

$100

Only

Promo Code: Up To $100 Off Cast Iron Radiator Orders $500+

Apply this promo code to save up to $100 on your Oswald Supply order when you spend $500 or more. Discount applies to items like cast iron radiators.

👍

10%

OFF

Grab Gaskets Deals – Get Topog-E, Black Max & Blue Max Now 10% Off!

$89.10

Only

Grab the Deal: 4 X 6 X 1/2 Elliptical Blue Max Handhole Gaskets 6-Pack – Get Yours For $89.10!

15%

OFF

15% Off All Home & Garden Essentials with Limited Time Offer

10%

OFF

Hurry! Limited Time Savings on Electrical Supplies & Equipment

$224.68

Only

Radiator Components Offered for $224.68 Today

$87

Only

6-Pack Obround Blue Max Handhole Gaskets Only $87!

$16.00

Only

Buy Hydrolevel VXT Feed Valve Service Kit For only $16.00 limited time only!

$166

Only

Obround Cast Iron Loose Bolt Flat Handhole Assembly with Ring - $166

$162.60

Only

Durable Boiler Seal Solution: Black Max Elliptical Gaskets (2-Pack) - Starting at $162.60

Ensure tight, lasting seals for boiler manholes with our reliable gasket pack.

$158.82

Only

Cast Iron Radiators Available for Just $158.82

Upgrade your heating system with a cast iron

20%

OFF

Unlock Savings Enjoy 20% Off on Handpicked Parts! Limited-Time Offer Shop Now and Upgrade Your Gear at an Unbeatable Price!

$290

Only

Attain Elegance: Universal Stainless Steel L Handle Trash Chute Door Available Now For $290!

Customer Reviews

4.5

Average Rating

6

Total Reviews

Todd Doyle

★★★★★

1 month ago

Quick order, fast shipping

Needed a new pressure gauge. Ordered it. Shipped fast. Arrived in good condition. Installed it, works fine. No issues.

✓ Reply submitted. Will be published after approval.

Anna

★★★★☆

2 months ago

Detailed feedback on boiler tubes

I ordered several boiler tubes for a specific repair project. The ordering process on their website was straightforward, though identifying the exact tube size took a bit of cross-referencing with their specs. Delivery was within the estimated window, about 6 business days to my location. The packaging was robust, and all tubes arrived undamaged. I had a question about installation and their support team was responsive, providing useful guidance. The quality of the tubes themselves appeared to be good, heavy-duty material. No issues with fitment during the repair. Overall, a solid experience, especially considering the specialized nature of these parts.

✓ Reply submitted. Will be published after approval.

Neil

★★★★☆

2 months ago

Got my boiler brush fast

Needed a new boiler brush, the old one was shot. Ordered it from Oswald Supply, and it got here quicker than I thought, took about 4 days to reach my place in Ohio. The brush seems sturdy, did the job. No complaints, pretty smooth experience overall.

✓ Reply submitted. Will be published after approval.

Gwen Marsh

★★★★☆

2 months ago

Good value on relief valves

I was looking for some relief valves and found Oswald Supply had a decent price, especially with the first order discount they offered. It made a real difference compared to other places I checked. Shipping wasn't instant, but it was fair for the cost. Felt like a solid purchase for the money spent.

✓ Reply submitted. Will be published after approval.

Jared

★★★★★

3 months ago

Always reliable service

I ordered more boiler handhole gaskets for our Fulton boiler, just like last time. Oswald Supply is consistently good. The parts always fit, and they arrive pretty fast. It's why I keep coming back for our industrial heating supplies. Good to know I can depend on them for these regular purchases.

✓ Reply submitted. Will be published after approval.

Oswald Supply Community Discussion

Share tips, ask questions & help fellow shoppers save more

C

Colin

2 months ago

Can I get a discount if I'm a new customer at Oswald Supply? Looking to grab a few things.

J Julia 2 months ago

Yeah, I got 10% off my first order when I signed up for their newsletter last year. Check their site, they usually have something like that.

0

D David Z. 2 months ago

They often do a first-order thing. Sometimes it's a pop-up, sometimes it's in a banner. Worth looking for.

0

8 Responses (2)

E

Elena

2 months ago

Wondering if Oswald Supply ships to Canada. I'm in Toronto and need some specific boiler tubes.

D Dan Romero 2 months ago

I'm almost positive they do. I've seen Canadian addresses mentioned in their shipping info before, but you might want to double check any extra customs stuff.

2

P Priya 2 months ago

Yeah, they ship to Canada. I had some parts sent up here a few months back. Shipping costs were a bit more, but it got here.

2

8 Responses (2)

B

Ben

2 months ago

Thinking of buying some boiler gaskets from Oswald Supply. Are they usually genuine parts or aftermarket stuff? Trying to avoid issues.

C Cleo 2 months ago

They sell both, but they're an authorized dealer for a lot of brands, like McDonnell & Miller. You can usually tell from the product description if it's OEM or aftermarket.

3

D Dana 2 months ago

I've always gotten good quality from them. Never had a problem with fit or anything. I think most of the major brand stuff is legit.

6

6 Responses (2)

D

Daisy

2 months ago

Hey, does Oswald Supply sell to regular people or is it just for contractors? Need a few parts for my home boiler.

C Chris 2 months ago

Nah, they sell to anyone. I'm just a homeowner and I've ordered from them a few times. No special account needed unless you want contractor pricing.

2

W Wendy Bennett 2 months ago

You don't need to be a contractor. They're open to the public.

5

3 Responses (2)

C

Chris B.

2 months ago

Does Oswald Supply have sales around the holidays? Specifically looking at some chute parts, wondering if I should wait for Black Friday.

D Daisy K. 1 month ago

They definitely have seasonal sales, especially leading up to winter. Black Friday industrial deals sound like something they'd do, worth keeping an eye out.

2

B Ben 1 month ago

Yeah, I've seen them do sales in the fall and winter months. October through March is usually their busy time, so they often have promos then.

3

2 Responses (2)

N

Nick

2 months ago

Hey, anyone know how fast Oswald Supply ships? I need some boiler parts pretty quick for a job next week.

P Phil Vargas 2 months ago

From my experience, if you get the order in early they usually ship same day or next. They're pretty good about that.

1

E Emma 2 months ago

Yeah, I ordered some sight glass last month and it got to me in like 3 days, standard shipping. I'm in Ohio though, so might depend on where you are.

0

0 Responses (2)

S

Sarah Vargas

2 months ago

Does Oswald Supply do free shipping? I'm trying to order a bunch of stuff and shipping costs can add up.

T Todd Marsh 2 months ago

Pretty sure it's free over 99 bucks. I always hit that when I order bigger stuff.

2

J Jared Romero 2 months ago

Yeah, it's $99 for free shipping. If you're getting a decent amount of parts, you'll probably clear that easy.

0

0 Responses (2)

I

Ivy Kaur

2 months ago

Anyone ever tried to return something to Oswald Supply? Got a boiler gasket that ended up being the wrong size, not sure what their policy is.

J James Whitfield 2 months ago

I returned some boiler brushes once. Was pretty straightforward, just make sure you still have the original packaging and it's within their return window. I think it's like 30 days.

4

K Kevin 2 months ago

Yeah, I've returned stuff. Just fill out their form online or give them a call. As long as it's not custom or used, you should be fine.

6

0 Responses (2)

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