Urgent!!! Fuel Resending Unit Question

I just finished replacing the fuel sending unit on a '02. The replacement was an ebay purchase. Having never done this after getting the pump assembly out, I found the replacement sending unit was similiar but different. I have soldered parts from the new to the old using shrink wrap over the soldered connections. All seems to be working. My question is are the soldered connections with shrink wrap pose any danger? Also, how does the electrical used to power the fuel pump and the sending unit not cause the fuel to ignite? My mind is running away with me at this point. If anyone can set my mind at ease or warn me of any danger, I would appreciate your response asap. I drove around the block and let the car idle for 5 minutes. Nothing but smooth running - so far. I've learned my lesson about ebay purchases!

Concerned

No problem doing what you did and don't worry about it! It will not ignite!

Thanks HOTZ28 - I'm was/am bit nervous around fuel systems. Any idea how the electrical equipment works in the tank for my own info. The worst part was trying to get the lock nut that holds the pump in. I used the old gasket but am thinking of replacing it with a new one if I need to go back in.

Relieved

Thanks HOTZ28 - I'm was/am bit nervous around fuel systems. Any idea how the electrical equipment works in the tank for my own info. The worst part was trying to get the lock nut that holds the pump in. I used the old gasket but am thinking of replacing it with a new one if I need to go back in.

Relieved
I am sorry, but last night I did not have time to give more details. As you know, creating sparks around gasoline can be dangerous; however, the in-tank fuel pump is very safe because there is no oxygen to support combustion. Fuel passing across the fuel pump's armature will be subjected to sparks and arcing and on the surface this appears to be quite dangerous, but the absence of oxygen means that there will not be an explosion. (There is no air in a vehicle fuel tank unless it is completely empty of liquid fuel).

Actually, by placing the fuel pump in the tank, it is safer than external pumps, because it allows the pump to be submerged in a cool liquid. Fuel vapor is the most dangerous element in a fuel tank because it combusts easily. Liquid fuel will not explode! :shakehead Remember, ignition temperature is the minimum temperature of which a material will burn or explode. It is the temperature which a mixture of flammable vapor and air would ignite without a spark or flame. The term "ignition temperature" is also used to describe the temperature of a hot surface that would cause flammable vapors to ignite. The ignition temperature of gasoline ranges around 500 degrees F.

I learn something every time I visit. Cudos to the moderator and all that chime into this forum. I just saved about $400 - $500 that has already been spent by my wife and kids!