I am getting lots of water in my tandom outfitter kayak . one hour trip produced about 3 gallons of water. how can we fix this problem leak?

Lots of things needed when you go for kayaking. It depends on you and where you want to kayak. If you go for fishing you need fishing types accessory but if you go for tour or adventures you need that types of thing. Considering these things, I will select some materials that you need. They are those :
Dry Bags and Dry Box ,Bilge Pump or Sponge ,Lightweight Tent ,Synthetic Sleeping Bag,Life Jacket,Water Filter or Iodine Tablets,Sunscreen,Watch,Paddle float,Compass (that floats),Towline,Maps and charts in waterproof case,Lip balm (SPF 15+),Insect repellent (as needed),Water in bottles or reservoirs-shielding hat,GPS (loaded with map files,Emergency flares or strobe,Two-way radios (1 in lead, 1 in sweep boat).

To know more about kayak you may visit here
Best Inflatable Kayaks in 2018 List of The Top Selling Models

Rheem 50 gallon Pro52-2 has EF .95, which makes it ordinary 240Volt 4500 watt non-simultaneous electric water heater that produces about 21 gallons hot water per hour, with 67 gallon first hour delivery.
Recommend 80 gallon per hour first hour for oversized bathtub.
http://bostonheatingsupply.com/Rheem/Rheem%20Residential%20Electric/Professional/Rheem_ResidentialElectric_Professional%20Spec%20Sheet.pdf

Maintain electric water heater and it will last indefinitely.
http://waterheatertimer.org/How-to-maintain-water-heater.html
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

Anode rod is located on top in separate port.
Anode keeps tank from rusting.

Year of Rheem water heater manufacture shows 3rd and 4th digit of serial number.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

large water heater, turn p the themo stat to a higher setting ( watch for burns with young childern and older folks)

or the best install a tempering valve. this valve mixs hot water with cold water before it goes into the building.

Again if you have young ones or old people they can burn faster than any other group.the best is a larger heater for the DIY person.

Thanks Tom

It sounds like a seal has broken and water is getting inside, tripping the GFCI. it may be possible to get a new set of gaskets for the pump, but it is not really an easy thing to do. Three years if it runs all day is quite a lot of hours. You could try a local electric motor shop, and ask for an estimate.

If you'r really lucky you may find a leaking fitting on top of the water heater thats draining down inside the shell and out the bottom, otherwise its time to replace a rusted out water heater.
Sorry

That is a warranty issue, see you dealer.

what is the canoe made of... it may not look pretty but fiberglass will work.... you can sand and paint it later as well

Your main considerations are waterproofing everything. Bags within bags is the order of the day so to speak. Travel light and justify everything you pack for it's usefulness. Pack things you will need during the day closest to the access hatches / cockpit, with other items packed deeper in the bowels of the craft.

Check the trim of the boat once packed. Look at it from the side as it is floating. It should be ever so slightly stern heavy. If it is bow heavy it will be very difficult to steer.