Consumer Reports

For the ultimate car camping, weekend warrior, and adventure accessory, the Yakima RoadShower takes center stage. This impressive powder-coated aluminum tube mounts on your roof rack, not only following you wherever you roam but also heating your water just by sitting on top of your car. It delivers pressure as intense as a typical garden hose, and as the tank empties and the pressure lessens, you can quickly and easily "top up" with a regular air pump &#40;like the one you brought for your bike&#41;. Once it's on your car, there's no setup required &mdash; simply unhook the hose from the side of the tank and spray liberally. Filling up with a hose is easy, but if you don't have access to one, it can be opened on top and filled by hand, then pressurized with an air pump. No pump? Leave the cap open, and you'll still be able to use it, though the trickle you'll get is better for rinsing dishes and splashing your face than cleaning your sandy kayak. 
The included nozzle works just like a standard hose head. This may be all you need for cleaning gear, rinsing feet, or de-muddying the dog, but it isn't great for an actual shower. For that, you'll probably want the Yakima RoadShower FlexHead, which we also tested, giving you an efficient if messily close-to-the-car shower. Also, if you fill at home and leave the pump behind, you'll find the pressure drops precipitously as the tank empties, and refilling that pressure with a short-hosed bike pump is a challenge. These things aside, this is a fabulous option for those who are constantly on the go, and if the 4-gallon version isn't big enough for you, 7 and 10-gallon versions are also available.

OutdoorGearLab

For the ultimate car camping adventure accessory, the Yakima RoadShower takes center stage. This impressive powder-coated aluminum tube mounts on your roof rack, not only following you wherever you roam but also heating your water just by sitting on top of your car. It delivers pressure as intense as a typical garden hose, and as the tank empties and the pressure lessens, you can quickly and easily "top up" with a regular air pump &#40;like the one you brought for your bike&#41;. Once it's on your car, there's no setup required &mdash; simply unhook the hose from the side of the tank and spray liberally. Filling up with a hose is easy, but if you don't have access to one, it can be opened on top and filled by hand, then pressurized with an air pump. No pump? Leave the cap open, and you'll still be able to use it, though the trickle you'll get is better for rinsing dishes and splashing your face than cleaning your sandy kayak. 
The included nozzle works just like a standard hose head. This may be all you need for cleaning gear, rinsing feet, or de-muddying the dog, but it isn't great for an actual shower. For that, you'll probably want the Yakima RoadShower FlexHead, which we also tested, giving you an efficient if messily close-to-the-car shower. Also, if you fill at home and leave the pump behind, you'll find the pressure drops precipitously as the tank empties, and refilling that pressure with a short-hosed bike pump is a challenge. These things aside, this is a fabulous option for weekend warriors or those are constantly on the go, and if the 4-gallon model isn't big enough for you, the RoadShower also comes in 7 and 10-gallon versions.
Read more: Yakima RoadShower review

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