{"id":516,"date":"2026-10-08T18:24:48","date_gmt":"2026-10-08T10:24:48","guid":{"rendered":"http:\/\/www.indiansaddlery.com\/blog\/?p=516"},"modified":"2026-10-08T18:24:48","modified_gmt":"2026-10-08T10:24:48","slug":"what-sizes-of-electrofusion-fittings-are-available-43c6-0a8d31","status":"publish","type":"post","link":"http:\/\/www.indiansaddlery.com\/blog\/2026\/10\/08\/what-sizes-of-electrofusion-fittings-are-available-43c6-0a8d31\/","title":{"rendered":"What sizes of electrofusion fittings are available?"},"content":{"rendered":"

Hey there, folks! If you\u2019ve ever shopped around for electrofusion fittings\u2014whether you\u2019re a plumber, an irrigation tech, or someone who\u2019s just had to dig into a pipe repair\u2014you\u2019ve probably stared at a wall of different sizes and thought, \u201cWait, how do I even pick the right one?\u201d As a supplier of these bad boys, I get asked this all the time: \u201cWhat sizes of electrofusion fittings are even out there?\u201d Today, I\u2019m breaking this down like we\u2019re chatting over a cup of coffee (or your favorite energy drink\u2014no judgment here) so you don\u2019t have to stare at that wall feeling lost. Electrofusion Fittings<\/a><\/p>\n

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First off, let\u2019s keep this real. Electrofusion fittings aren\u2019t one-size-fits-all (duh, that\u2019s why you\u2019re here). They\u2019re made to work with plastic pipes\u2014think HDPE, PP, that stuff used for water lines, gas lines, drainage, even some industrial piping. The size is all about matching the outside diameter (OD) of the pipe you\u2019re working with, right? Because if the fitting doesn\u2019t slide on that pipe just right, the weld\u2019s gonna be garbage, and no one wants a leak down the line that causes more work (and more headache).<\/p>\n

Now, let\u2019s get into the actual sizes you\u2019ll come across. I\u2019m not gonna throw you a bunch of jargon that makes your eyes cross\u2014we\u2019ll split this into the main categories you\u2019ll see in the industry, no fancy acronym soup.<\/p>\n

Starting small, because that\u2019s where a ton of residential and light commercial work happens. The tiny stuff usually starts at 20mm. Yeah, 20mm\u2014think the size of a standard drinking straw, give or take. Wait, no, hold on, actually a lot of water supply lines for houses start at 20mm. We sell a full line of 20mm electrofusion couplers, elbows, tees, all that\u2014perfect for small irrigation setups, under-sink water lines, even some low-pressure gas lines for outdoor grills (don\u2019t quote me, but that\u2019s the vibe). Next up is 25mm, that\u2019s like the size of a regular marker. You\u2019ll see this for bigger residential water lines, maybe small commercial building supply. Then 32mm\u2014think a thick crayon\u2014steps up for when you need more flow, like a whole-house water main for a slightly larger home. We don\u2019t skip these small sizes, either\u2014they\u2019re super popular, so we keep \u2019em in stock year-round, no backorder headaches.<\/p>\n

Moving into the mid-range, which is where most commercial and agricultural work lives. This is where sizes start getting substantial: 40mm, 50mm, 63mm. Let\u2019s be real, 63mm is about the size of a roll of quarters, and that\u2019s for when you need to move a lot of water quickly. Agricultural irrigation laterals, small municipal water branches, even some industrial process lines\u2014these sizes are workhorses. We also do 75mm and 90mm here, which are like the size of a small plate and a dinner plate, respectively. If you\u2019re setting up a main line for a whole farm, or a subdivision\u2019s water feed, these mid-range guys are where it\u2019s at. I\u2019ve got a buddy who does golf course irrigation, and he swears by our 90mm tees\u2014says they\u2019ve cut his install time in half compared to old-style fittings.<\/p>\n

Now, let\u2019s get to the big boys. These are the sizes that no DIYer touches (unless they\u2019re super experienced) and are mostly for municipal, industrial, and large-scale infrastructure. We\u2019re talking 110mm, 125mm, 140mm, 160mm, 200mm, 250mm, even up to 630mm. Wait, 630mm is like the size of a big suitcase\u2014yeah, that\u2019s massive. Municipal water mains, gas transmission lines, industrial wastewater systems\u2014you need these when you\u2019re moving hundreds of gallons (or liters) of stuff every minute. I remember last year we had a big city project that needed 400mm electrofusion couplers for a new water main, and we had to get them shipped in a week because the original supplier dropped the ball. But that\u2019s why we keep a solid stock of the big sizes, when you need them, you need them yesterday.<\/p>\n

Wait, hold on\u2014can\u2019t forget about pressure ratings here, because size ain\u2019t everything. A lot of new guys mix this up. A 63mm fitting for a 10-bar pressure line is totally different than a 63mm for a 4-bar line. We label every single fitting with both size and pressure rating, so you don\u2019t grab the wrong one. That\u2019s one mistake I see all the time: someone buys a fitting that\u2019s the right OD, but it can\u2019t handle the pressure, and boom\u2014leak. We make sure our labels are big, clear, no tiny print, so even if you\u2019re working in a ditch with a flashlight, you can read it.<\/p>\n

Also, let\u2019s talk about what\u2019s not a size\u2014wait, no, sometimes you\u2019ll hear \u201csDR\u201d numbers thrown around, like SDR 11 or SDR 17. That\u2019s related to size and pressure, right? SDR is standard dimension ratio, which is the pipe\u2019s OD divided by its wall thickness. So a 63mm SDR 11 pipe has a thinner wall than a 63mm SDR 17, so the fitting needs to match that SDR too. Good news: all our electrofusion fittings are made to work with specific SDRs, so when you order a size, just tell us your pipe\u2019s SDR and pressure, and we\u2019ll hook you up. No guesswork there.<\/p>\n

Now, why does size even matter beyond just fitting the pipe? Let\u2019s be practical. If you use a fitting that\u2019s too small for your line, you\u2019ll get flow restriction\u2014like trying to drink a milkshake through a straw, it\u2019s slow and frustrating. Too big, and you\u2019ll have gaps in the electrofusion weld, which is a disaster. The electrofusion process works by running current through built-in coils in the fitting, melting the fitting and the pipe together, so they become one solid piece. If there\u2019s a gap because the size is off, the weld won\u2019t hold, and you\u2019ll be back digging it up way sooner than you want.<\/p>\n

I\u2019ve seen so many people mess this up. Last year, a local plumber came to me panicking because he bought a bunch of \u201c60mm\u201d fittings for a 63mm pipe, and they were too loose. Turns out he was looking at the pipe\u2019s inner diameter, not the outer\u2014oh man, that\u2019s a rookie mistake. That\u2019s why we always say: measure the outside of your pipe with a caliper, not a ruler, because plastic pipes can have slight inner diameter variation, but the OD is standard for their size. Pro tip: if you don\u2019t have a caliper, a tape measure works, just add a little wiggle room and check the standard sizes I mentioned (20,25,32,40,50,63, etc.).<\/p>\n

Another thing: we don\u2019t just do straight couplers here. Our fittings come in all shapes for every size\u2014elbows (90-degree, 45-degree, even some odd angles), tees, crosses, reducers (super important when you need to go from a big line to a small one), end caps, even saddle fittings for tapping into existing lines. Every single one of these is available in the size range we talked about, so you don\u2019t have to hunt for different sizes for different parts of your job.<\/p>\n

Wait, what about metric vs. imperial? A quick note\u2014most of the world uses metric for electrofusion fittings, which is what we stock. But if you\u2019re working with imperial-sized pipes (like inches), we can convert that for you too. For example, a 1-inch pipe is roughly 25mm, 2-inch is 63mm, so we can help you match that up no matter what measuring system you\u2019re used to. No need to stress over conversion math\u2014we\u2019ve got your back.<\/p>\n

Now, let\u2019s get real about stock. As a supplier, I know nothing sucks like needing a fitting for a job and it\u2019s out of stock. That\u2019s why we keep almost all the sizes I mentioned in our warehouse\u2014from 20mm all the way up to 630mm. The small sizes (20,25,32) are always on hand, mid-range (40 to 200mm) are stocked weekly, and the big boys (250 to 630mm) are kept in bulk because municipal projects pop up all the time. We also do custom fittings if you need a size that\u2019s not standard, but 99% of the time, what I listed is exactly what you\u2019ll need.<\/p>\n

Let me give you a quick example of a real job. A farmer in central state (I\u2019ll keep it vague, no locational stuff) came to us last spring for a new pivot irrigation system. He had 160mm pipe for the main line, 63mm for the lateral lines, and needed tees, elbows, and reducers. We got him all in stock, delivered in 3 days, and he said the install went twice as fast as his last supplier because all the sizes matched perfectly. That\u2019s the kind of thing we pride ourselves on\u2014no surprises, no wrong sizes.<\/p>\n

So, to wrap this up quick, the main sizes you\u2019ll find for electrofusion fittings, broken down by use:<\/p>\n