Water Heaters - Wind blows pilot out on water heater

I have a two year-old doublewide moble home with a propane fired water heater installed in a closed space accessable through a bedroom closet. This is a HUD spec installation from the factory. The water heater is vented both in the crawl space and through the roof. When it is windy outside, the water heater pilot often blows out. Sometimes there is so much wind-effect inside the burner space it blows out my match when I am trying to re-light the pilot. Is there any way to keep this pilot lit short of buying a new demand type water heater with a $1000 price tag?

Might check and see if you can get another type of rain cap ---top . For the vent pipe out the roof.

Not that familiar with trailer installations. What do you mean, "vented in crawl space and in attic"??. Is one a cold air inlet and one a heater exhaust?? Units that have both, often have only one chimney, which is a double wall tube for air inlet and exhaust. Whayver you have, is there a cap on the outside end to diffuse or redirect the wind??

You have an extreme venturi effect (caused by wind blowing across perpendicular to the flue pipe, generating upward draft velocity) going on so Ed could be right about the cap thing to maybe cut down on that air velocity sucking up air from the crawl space up into water heater and out the roof. The venting you speak of in crawl space would be for fresh air intake to the burner. Trailer furnaces often have that as well.

Also see if you can't bend the thermocouple toward the pilot so that the pilot is more fully engulfing the thermocouple even if the flame is pulled upwards. I have had to do this on trailer gas water heaters. To do this though, you have to remove the whole burner to work on it (by removing main gas tube, pilot tube and thermocouple connections into the gas valve - easy project.)