How do I replace a leaky cartridge for a Newport Brass 850 bathroom sink faucet

SOURCE: Remove the base of a pedestal sink.

There are two bolts on either side of the sink. Remove them and lift the sink off of the base. Sometimes, depending on who installed it, you can slide the base out without removing the sink. Hope this helps.

SOURCE: Cold water only from single-arm shower faucet in master bathroom

Yes - This is an easy (though not widely known) diy fix! Remove the cover of the faucet handle (may pop off if crystal type or use a screwdriver to remove the screws) inside there is a scald guard safety mechanism - using a flathead screwdriver, turn the guard some the left. There should be a guide so that you do not turn the water up too hot. If there is not, you may need to consult a plumber or supplier in order to adjust the hot to a moderate temperature.

Hope this helps! ;)

SOURCE: HOW TO DISMENTLE OR REPLACE A MOEN SINGLE LEVER

shut water off at stops under sink. Unscrew water supply lines from directly below handles. Above them you will find plastic nuts, remove them. Disconnect pop/up lever and you should be able to lift faucet from sink.

SOURCE: JADO BATHROOM SINK FAUCET DRIPS

Jado are ceramic disc cartridges no washers you should replace both sides.You need to remove the handle and unscrew the cartridge

SOURCE: New MOEN 1222 cartridge leaks

remove it and carefully inspect it, you might have scuff'd up the rubber's on the cartridge when you inserted new one.clean out,look in hous'ing for any foriegn mat.etc .you may need another new cart.