Absolutely not! You should never tow a tube from a wakeboard tower. The amount of force could damage or break a wakeboard tower, lead to damage of your boat's fiberglass hull and possibly injure someone. Towing a tube is very different than towing a wakeboarder. There could be significantly more drag or anchoring force than a wakeboard tower was designed to handle. We recommend you use a low transom mounted ski tow eye hook to tow tubes.
In fact, even factory installed wakeboard towers found on the most expensive wake boats don't allow you to tow tubes. They all have warning labels that specifically state not to otherwise it will void your warranty. If an aftermaket wakeboard tower manufacturer claims their towers are strong enough to pull tubes, we would advise you not to.
Towing tubes or towables from a wakeboard tower's tow point is NOT recommended on any wakeboard tower by any manufacturer regardless of what they advertise- it's just not safe. In fact, it will void your warranty. The point of a wakeboard tower is that it has a high tow point that helps pull the wakeboarder up in the air and, at the same time, doesn't pull them back down like a lower positioned tow eye hook. Wakeboarders benefit from an elevated pivot point- not tubers. When a towable is being pulled from a high tow point, it is actually pulling up on the front of the inflatable which allows wind to get underneath and at even relatively low speeds, it can quickly lift up and flip it over. Obviously, it's a very dangerous situation when friends and family are launching off and smacking onto the water at high speeds.
There are so many variables that come into play with towing inflatables: the number of people being towed, speed, driving style, whether or not the driver is "whipping" the inblatable around, how choppy the water is, on coming wakes, the style of the inflatable, and even wind speed. The wide range of motion created by swinging multiple people around on a tube connected to a high tow point creates excessive strain that towers and the fiberglass hull of your boat were not originally designed to handle.
Often times, it is not the tower that is damaged- it's actually the boat's fiberglass hull that becomes the weak point and breaks first. Also, on rare occasions, a towed tube or towable can land in choppy water or in front of an on coming wake and partially submerge under water (also known as "submarining") and at even relatively low speeds, it could act as a sea anchor or drift sock creating excessive and abrupt force pulling back on the tower and boat. Regardless of the tower's strength or claims by some tower manufacturers that it is safe, it is definitely not recommended.
For everyone's protection (and your boat), please use the low elevation stock tow point or eye hook on your boat for towing tubes. The "annoying" spray riders get from the tow rope spitting up a little spray of water might be solved with a wake tower, but the potential dangers are not worth the risk. Reserve the tower's tow point for wakeboarding, kneeboarding and wake surfing.