I have an 4005 Am Standard "Fairbury" faucet, that is leaking out the side near the valve. Can I tighten something to stop the leak or do I need to replace o-rings and such?

The faucet may have been installed incorrectly (even backwards).

tighten the retain nut mounted under sink.

common porblem

looks like a long thread at its base ..
might be able to tighten up the slack





American Standard 4005SSF Fairbury Kitchen Faucet Parts

You do not have to disconnect the water hoses, but you do have to turn the water valves off before loosening any parts on the faucet.

Check whether the faucet is leaking or the drainage is leaking.
If the faucet is leaking, you need tools to loosen the faucet to check whether the hoses are leaking or not. If the drainage is leaking, you can tighten the slip nut.

make this steps and fix it. God bless you
f a faucet leaks, replace seals and gaskets . If a shower head leaks, create a better seal or replace seals .
If a sillcock wears out, replace the washers .
If a compression faucet drips from the spout, replace the washer and/or the seat .
If a faucet leaks from the handle, replace O-ring(s), replace the packing washer, tighten the packing nut, or replace worn packing, depending on the valve type.
If a ball or cartridge faucet leaks from the collar, replace worn O-rings .
If a disk faucet leaks around the base or has reduced flow, replace cracked or pitted disk assembly or worn inlet seals
If there is water under the sink, tighten the faucet-set locknuts under the sink. You also can replace putty or a gasket, replace a worn faucet, or replace leaky supply tubes .
If the aerator leaks around the edge, replace the washer in the aerator
If the spray hose leaks or has reduced flow, replace the O-ring on the diverter valve, replace a worn washer at the base of the spray head, or clean the diverter valve and spray head

follow this steps and fix it. God bless you
If a faucet leaks, replace seals and gaskets .
If a shower head leaks, create a better seal or replace seals .
If a sillcock wears out, replace the washers .
If a compression faucet drips from the spout, replace the washer and/or the seat .
If a faucet leaks from the handle, replace O-ring(s), replace the packing washer, tighten the packing nut, or replace worn packing, depending on the valve type .
If a ball or cartridge faucet leaks from the collar, replace worn O-rings .
If a disk faucet leaks around the base or has reduced flow, replace cracked or pitted disk assembly or worn inlet seals .
If there is water under the sink, tighten the faucet-set locknuts under the sink. You also can replace putty or a gasket, replace a worn faucet, or replace leaky supply tubes .
If the aerator leaks around the edge, replace the washer in the aerator .
If the spray hose leaks or has reduced flow, replace the O-ring on the diverter valve, replace a worn washer at the base of the spray head, or clean the diverter valve and spray head .

call AS at 800-442-1902, they il replace it free of charge, lifetime warranty. New design for replacement faucets, will not happen again, I didnt need to send receipt or anything, great people.

Chances are your supply line is leaking. One of three things (easy fixes).
1) There is a "packing nut" on the shut off which holds the handle on - this could be leaking (just tighten with pliers while open).
2) There is a nut directly above the shut off (3/8 inch) which goes directly to the faucet. Simply thighten this nut.
3) There is yet another nut above the last (very near the faucet). This is a 5/8 nut and you will most likely need a "crescent wrench" to tighten this as you cannot get pliers up there. You can purchase a crescent wrench at any hardware store for about 10 bucks. Good luck!

you need to replace the 0-rings in side the spout between the base and neck,