How to open the housing on big blue 20 to change filter

You guys probably have water with lots of sediment in it.
Install a larger sediment filter on the line going in to the refrigerator or even better to install one at the point of entry to your house.

A whole house sediment filter will make sure that all water coming into the house is free of particulate matter. This will make your water using appliances like the refrigerator filter, dishwasher, water softener, faucet aerators...etc last way longer.



WECO BB 10SED Big Blue Water Filter System for Sediment Filtration

there is a nice big o ring between the valve and the filter body. chances are that it is dried out and holding fast. it will take some muscle to separate the two but it can be done. be prepared to change that o ring on re-assembly.
here is a breakout plan to help you visualize
ST18 ST 20 ST24

Check the plug on the side to see if it's loose or missing.

Always turn to the left to loosen, right to tighten (righty tighty, lefty loosey). Look at the tips section for loosening stubborn filter housings.
RJ

The Culliagan manual does not specify clockwise/counterclockwise, but what that means is its
implied to be counterclockwise. If you're using the "Big Blue HD-950" filter housing, then
you'll also want the Culligan SW-3 Filter Housing Wrench. But a HUGE pair of Channellock pliers
would also work (while leaving behind a few teeth marks in the plastic housing).
reference:
https://www.filtersfast.com/P-Culligan-HD950-Water-Filter-Housing.asp

Why did it fail? How did it fail? Was it the plumbing that failed? Replace it with a Pentair filter housing, 10" housing, 20" housing or Big Blue housing and make sure it is plumbed in properly. It is very unusual for a filter housing to fail unless it freezes up.
RJ

Your oil filter sits inside a housing with a cap, theres a tool thats used to remove the cap its like a big socket, you may also use a socket, if you open your hood and look at the motor, look down the engine toward trany you will see oil filter housing, let me see if a picture is available to help. here a diagram of the engine its of the engine componets i circled the filter housig.

The best way to get it off is as follows.
1. Turn the incoming water off.
2. Open the closest cold water faucet and let it run until pressure is relieved.
3. Close the outlet of pre-filter housing.
4. Push the pressure relief button and hold it down until no more water comes out.
5. Use the filter housing wrench to unscrew housing.
6. If it is still hard to take off repeat steps 2-5.
7. Clean the housing and o-ring, lubricate the threads of housing and head with silicone lube or plumbers faucet lube. Lubricate the o-ring with same.
8. Replace filter
9. Only tighten the by hand NOT with wrench.
10. Turn water back on and hold pressure relief button to bleed off air.

The number one reason for filter housings being so hard to get off is people tightening the filter housing with a wrench when re-installing it.

RJ

please explain what you call a micro fiter--- do you mean the air filter or the pollen filter