When measuring for bulkheads, you will need a hole in your tank that is slightly larger than the "C" measurement for the corresponding bulkhead but no larger than the "A" measurement.
Example: If you have a 1.75" diameter hole currently in your tank, then you would want to use the 1" ABS Bulkhead.
1/2" ABS Bulkhead Thread X Thread Dimensions (see diagram)
A - 44mm/1.72"
B - 43mm/ 1.69"
C - 27mm/1.06"
Installation Hole Size - Use our 30mm Diamond Coated Glass Drill Bit for DIY installation
3/4" ABS Bulkhead Thread X Thread Dimensions (see diagram)
A - 52mm/2.04"
B - 50mm/1.98"
C - 34mm/1.33"
Installation Hole Size - Use our 35mm Diamond Coated Glass Drill Bit for DIY installation
1" ABS Bulkhead Thread X Thread Dimensions (see diagram)
A - 68mm/2.67"
B - 63mm/2.48"
C - 42mm/1.65"
Installation Hole Size - Use our 45mm Diamond Coated Glass Drill Bit for DIY installation
1 1/4" ABS Bulkhead Thread X Thread Dimensions (see diagram)
A - 77mm/3.05"
B - 71mm/2.80"
C - 51mm/2.00"
Installation Hole Size - Use our 53mm Diamond Coated Glass Drill Bit for DIY installation
1 1/2" ABS Bulkhead Thread X Thread Dimensions (see diagram)
A - 86mm/3.38"
B - 73mm/2.87"
C - 59mm/2.32"
Installation Hole Size - Use our 60mm Diamond Coated Glass Drill Bit for DIY installation
2" ABS Bulkhead Thread x Thread Dimensions (see diagram)
A - 98mm/3.85"
B - 73mm/2.87"
C - 72mm/2.83"
Installation Hole Size - Use our 75mm Diamond Coated Glass Drill Bit for DIY installation
I keep getting the 1/2" By Ramon on 6/15/2016Ramon wouldn't recommend this product to a friendAlthough I ordered the 3/4" bulkhead, I received the 1/2". Customer service was kind enough to send me another, but it was 1/2" again. I got tired of waiting, so I bought one at my LFS. This is the only instance I've had difficulty with BRS.
better build quality By Victoria on 4/21/2016Victoria would recommend this product to a friendUsed a thereaded one with a threaded cap to replace the existing bulkhead that was set up for an external pump on a second hand sump. This worked perfect to patch the hole and shipped free fast
Needs NPT threading By Phil4fish on 9/10/2015Phil4fish would recommend this product to a friendIt seems these bulkheads have just straight threads instead of NPT thread. PVC and barb fitting all use NPT threads so they just don't seal well. Since there isn't much choice in bulkheads, it's the only thing out there, so you kind of have to recommend them by default. The schedule 80 bulkheads look like they'd work, but the hole size is different. If have a choice and are drilling your tank, try the schedule 80 bulkheads instead.
Decent Product By Peter on 5/25/2015Peter would recommend this product to a friendGood product. Just make sure you use a lot of plumbers tape.
Good Bulkhead By Andrew on 5/12/2015Andrew would recommend this product to a friendMake sure to seal the threads on these or they will leak. I used some silicone on mine
Great By Reefermaddness on 4/14/2015Reefermaddness would recommend this product to a friendAmazing bulkhead! It screws and tightens. What more could you want!
using these components in my Aquaponics system By JAMES on 3/15/2015JAMES would recommend this product to a friendI am using these components in my Aquaponics system. All working well so far.
I do wish that the clean up the extraneous plastic seams that are present on the inside and outside the threaded fittings. It means a little more effort when screwing in the fittings.
Cracked Down Seam By Matthew on 3/12/2015Matthew wouldn't recommend this product to a friendHaven't really been able to use this yet but here is what I discovered. I purchase a few bulk heads in various sizes for my new acrylic tank. The holes were already drilled for the abs sized bulkheads so I didn't go SCH80 for the bulkhead.
I fitted all 4 of my bulkheads in my tank and plumbed in all of my plumbing in SCH80. The fit on the 1.5" sizes do not go in but half way on either end. The 1" sizes do fit well, or so I thought. One of my 1" sized bulkheads split down the seam and leaks. So much so I had to drain the 300 gallon tank so I could run to my LFS and get a quick replacement. Luckily they have them in stock.
Looking back on this, my next tank will be using the SCH80 bulkheads. I just don't reccomend this for someone looking to hold back a large amount of water.
Amazing just amazing! By Jonathan on 1/24/2015Jonathan would recommend this product to a friendWorks just like described.
Good product By Cristian on 11/12/2014Cristian would recommend this product to a friendHaven't tested my new bulkheads, but seem like a solid product, I have no doubt they will work well.
3/4" Great Bulkhead By Mark on 11/2/2014Mark would recommend this product to a friendThis is a very sturdy and durable piece of equipment.
pretty good By ryan on 6/18/2014ryan would recommend this product to a friendthreading maybe alittle different form bulkhead to bulkhead. but overall good product
Ask a question
A slip fitting is one that you insert a pipe into and then glue. A threaded fitting is one that has threads and is screwed together with another threaded fitting. A pipe wont go into a threaded fitting and vice versa so which bulkhead you get really depends on what type of fitting you plan to connect to it. If for example you want a threaded strainer on one side and a threaded barb connection on the other, a thread x thread bulkhead would be what your looking for.
75G display + 20G sump. Do you recommend a different pump? Thank you.
We recommend at least 2 overflow drains coming down with two 1" drain lines. additionally larger drains can work up to 1.5" drain lines. The 4000 pump will work great on that system!
We would not attempt to drill again if the hole is 3/4" in the acrylic you can use the smaller size bulkhead. Schedule 80 and ABS do not have a difference on most tanks and we recommend ABS as it is a more universal size however Sch. 80 is rated for higher pressures.
If you have a threaded fitting then a 3/4" male threaded and 1" male threaded fitting would go into the 3/4" and 1" bulkheads respectively.
Schedule 80 threads will work great with an ABS bulkhead. You will want to ensure that plumbers or Teflon Tape is used to ensure a water proof seal. Feel free to let us know if you have any further questions!
You did buy the correct size however the only flaw is that you are attempting to thread onto the outside threads of the bulkhead. Unfortunately nothing threads onto the outside threads of the bulkhead except the nut. All plumbing will be glued or (male threaded) on the inside diameter of the bulkhead. If the inside of your bulkhead is smooth you will need a Spigot x Barb fitting to be glued in (If it is threaded on the inside diameter you can use male NPT x Barb. I have included the links below.