I have portable hot tub. where you connect the tub to the motor, pipe B where you connect them it leaks. drips water where you screw them together. how do you suggest I fix that?

hot water coming our sounds like the oressure relief valve operation. Check the water pressure gage is not 3 bar or above. Water dripping is a leak from one of the pipes or more likely joints or other water connections. to the unit. trace water upwards to highest point and there is the leak

sounds like you have a leaking solonoid valve (thats the valve that your water pipe connects to at the back of your machine) replacing it is quite easy if you know how to remove the top of your machine (2 screws). If you decide to have a go, disconnect from the mains before doing anything else, and turn off the water supply to the machine. you will need to know if it is filling with hot or cold water (if you have 2 water pipes connected). An easy way to find which it is, is by turning off either the hot or cold connections to it one at a time when its not in use. After all that remove the top of the machine disconnect the leaking valve from the internal pipes and electricial connections (remembering where they go) and replace it with the new one.

If you have a leaking water heater there is a serious problem.
http://waterheatertimer.org/Water-heater-leaking.html
Page shows how to limp along on a leaking water heater if your water heater needs replacement.

One of three things is causing the water:
1) Loose water connection on top of tank that is dripping down inside tank >> check pipes on top of tank.

2) The vent is clogged or not working correctly causing condensation inside flue pipe.
Condensation water is dripping back down inside tank.
Problem means possible CO poisoning if gas is not venting.
Look at vent pipe to see if joints are corroded.
Use long fireplace match > light match and put into draft hood at top of tank and see if smoke goes up.
Put hand at draft hood opening when water heater turns on to see if vent gas enters home.
Do same test when furnace turns on to see if furnace vent is pushing back into water heater.
Does water heater vent inside same pipe as furnace? You may need to set up separate vent for water heater if furnace gasses are pushing back into home.
Check furnace vent for obstructions.
Look at vent stack top of home to see if hood is in place.
Check if bird nest is built inside warm vent pipe.
Improper flue is top priority for getting fixed so vent gasses properly escape home.
You may have to call a plumber.
Professional plumbing forum:
http://www.thetankatwaterheaterrescue.com/forums/forum3/

3) Your water heater is rusted out.
A rusted tank has to be replaced.
It cannot be repaired.
However, before replacing tank, you do not want a tank failure where tank ruptures and water runs inside home until water is shut off.
This will cause major damage.
Protect yourself first.
Turn off water valve above tank.
Move gas knob to 'pilot' so burner is not heating water.
Open tub spout on hot side to relieve pressure on tank so it will not rupture.

Now you're protected.
Link above shows how to limp along on failed tank until you can replace heater.

You need a new gas water heater from Lowes or Home Depot
Look at label on side of you tank for gallons and btu's of your water heater.
Measure height to flue pipe so you get same height water heater, so pipes don't have to be changed.
You need a pipe wrench and teflon tape which will be wrapped on each pipe thread when pipes are reassembled.

Step1) Drain water heater using valve at bottom of tank.
http://waterheatertimer.org/Water-heater-will-not-drain.html

2) Turn off gas valve going into heater.
When gas valve is perpendicular to gas line, then gas is off.
Dissemble gas line to water heater.

3) Disconnect flue pipe and support flue pipe with wire so it doesn't not fall down. Flue pipe joints should be held together at each joint with 3 screws.

4) Turn off water. Shut off valve is on COLD side.
Disconnect water pipes.

5) Move old water heater out of way.

6) Set new water heater in place. Put water heater in drip pan.

7) Connect water pipes >> cold goes to side marked cold.
Hot to hot.
Buy new flexible water connector pipes at home center for easy installation of water pipes.

8) Connect gas line exactly as it was connected before.
Home center sells flexible gas line connector for easy installation of gas line.
To test for gas leak after installation, mix liquid soap with water and put around gas line joints to see if there are bubbles.
Natural gas has less pressure than water lines, so gas pipes are easy to seal with ordinary wrench.

9) install TP pipe that runs to floor. Use old one off old heater.

10) Fill tank completely with water until water is coming out of tub spout.

11) Turn on gas, and light pilot as shown in manual.
New gas heater sometimes have small water leak when first fired up, so ignore a bit of water.

12) Save water heater manual like it is gold, and read everything in manual.

It sounds like you need to replace it, Actual cost can very widrly depending on your location but I would say $350-400 is probably close. Plus installation unless you can do it yourself. Hope this helps. Thanks

It sounds like two problems.
Problem 1) Clog inside faucet or clog inside pipes at faucet
Remove supply tubes leading to faucet and see if problem is inside pipes or inside faucet.
My bet is clog inside faucet.

If you have galvanized pipe that meets copper pipe, this can be trouble spot.
Article on clogged water pipes at Inspectapedia:
http://www.inspectapedia.com/water/Water_Pipe_Clog_Repair_Guide.htm

Article on clogged pipes:
http://www.waterheaterrescue.com/pages/WHRpages/English/Troubleshooting/Tanklets/backflushing.html

Problem 2) Water heater leak ... you say tank valve is leaking? Is that cold-water shut-off valve? Or tank drain valve? Or TP valve?

If cold water shut-off is leaking, then replace shut off.

If tank drain valve is leaking, then check if plastic valve is cracked. If drain valve is cracked, then replace with a brass valve from Home Depot. If plastic valve breaks off, then use hammer and screwdriver to gently chip out the broken plastic valve. New valve threads need teflon tape to seal pipe. If valve is just dripping, then put garden-hose cap over end of valve and screw down tight.

If TP valve is leaking, then replace with same temperature and pressure rating. New TP valve threads need teflon tape to seal pipe.

Problem 3) If pressure is low all over house:
Buy pressure gauge at hardware store that screws onto hose connection.

Test pressure on outdoor spigot.
Open faucet and check if pressure drops. This says if problem is inside pipes that enter house.

Test pressure on water heater drain valve.
This says if pressure problem is before -or- after water heater.

If problem is before the water heater, then shut-off valve located on cold water line is suspect.
If problem is after water heater, it could be in hot water outflow pipe on top of water heater, or a nearby elbow.
Remove hot water line leading from water heater and check pressure. This says if problem is where hot water leaves tank.
Read articles above about clogs inside water lines.

On this valve the hot/cold in reverse is easy enough to fix, but the faucet dripping at the handle is another issue. To reverse the hot and cold, turn off the house water, relieve the pressure by opening a nearby faucet. Once the water stops, remove the handle and faucet cover so you can see the valve. then the four screws that are visible need to be removed. Mark one of the screw holes with a crayon or pencil and then remove by pulling straight out. Once out, inspect the main o-ring right behind where it sits against the valve, (if this is damaged, it might be why the handle area is leaking) then turn the whole assembly clockwise 180 degrees then insert straight back in and insert screws. Tighten screws until snug. Turn water back on before installing cover and handle to check for leaks. If no leaks are found, install cover and handle and check for proper position of hot and cold. If there are leaks, tighten screws in clockwise rotation tightening each screw a quarter turn, then moving to the next one until dripping stops. If dripping is from center of stem, where the handle attaches, you will need to contact Price Pfister to request a replacement. They are very good to work with. Good luck.

If the two parts screw together you need to get some plumbers tape , turn the water off ,dry the ends and put the tape on tight and just re-screw them back together.

Yes the weight of someone in the tub plus the water can push the tub down far enough to cause the leak.
Unscrew the flange in the tub that holds the drain to the tub. Get some plumbers putty and make a bead to fit between the tub and flange.
Make sure the rubber gasket is clean ..use a bit of plumber's putty on this as well. Get an assistant to stand in the tub while you snug things up.
Snug it up tight.... replace if the threads are stripped as you said.
Plus if your house is less than a year old, I'd talk to the contractor/builder if possible about warranty work...most reputable builders will cover their work for the first year.

Hi, If you remove the screws on each side of the door opening, the front panel will come free. You might be able to lok in and see the preasure hose. Id the hose leaking or the cup it attaches to?
I hope this helps. Please let me know if I can assist you further. Thanks
Vic

If it is dripping from the connection where it goes to the water spout you can unscrew the connection and wrap teflon tape or Pipe Joint Compound on the Threads. Now you can Thread the Shower Head Back on, with No Leak. IF..... It is leaking from the Shower Head Itself There May Be a Problem with the diverter handle/lever. If it has a Pull Type Lever, sometimes you can screw the Lever up or down for the proper water restriction to the Shower Head. However if the Hot and Cold Handle/Lever is OFF, There should not be any Water coming out from anywhere! If water is coming out off the Tub Spout, with the Shower Off, then you will have to replace some washers or Cartridges in the faucet(s) to stop the dripping. You can do this easily....Just Ask) Remember though, that some shower Heads may Drip for a Few Minutes After they are Turned off. There is still water in the Supply neck and needs to escape, either though the tub Spout or Shower Head.......Hope this Solution Helps you with your Drips.....Joe