TeraPump TRPMW100 Battery Drinking Water Pump [Excluding Glass] This pump is BPA-FREE Fits most crown top 5 or 6 gallon bottles 1 gallon per minute Made of high quality food grade plastic, long lasting operating life. Total Length: 28" ; Discharge Tube Length: 7" ; Suction Part Length: 18" Unscrew the cap on the pump handle and insert <span class="a-text-bold"><span class="a-text-italic">two &#034;D&#034; size batteries</span></span> checking the polarity into the compartment. Adjust the bottle cap to the height of container and fix the pump with the fastner. Make sure to keep the tube cover <span class="a-text-bold"><span class="a-text-italic">1/4&#034; to 3/4&#034;</span></span> above the bottle of container for the <span class="a-text-bold"><span class="a-text-italic">best performance.</span></span> Assemble the<span class="a-text-bold"><span class="a-text-italic"> discharge spout </span></span>firmly to the <span class="a-text-bold"><span class="a-text-italic">discharge hole</span></span> Click the switch to turn on the pump and click again to <span class="a-text-bold"><span class="a-text-italic">stop. </span></span>To use just in short time,<span class="a-text-bold"><span class="a-text-italic"> push down </span></span>a little and hold the<span class="a-text-bold"><span class="a-text-italic"> switch</span></span>