Neptune Dos Head Replacement

[cibansky]

Anybody knows when to replace the heads?
once a year, twice a year?
or simply when they're broken

Thanks

 

[Miller535]

Anybody knows when to replace the heads?
once a year, twice a year?
or simply when they're broken

Thanks

I saw a video with terrance and he said they were rated for a certain amount of hours. I do not remember how many. Me personally, I am going to just keep calibrating it every 3 months or so. And as long as it calibrates and works fine, I am not touching it.

 

[cibansky]

I saw a video with terrance and he said they were rated for a certain amount of hours. I do not remember how many. Me personally, I am going to just keep calibrating it every 3 months or so. And as long as it calibrates and works fine, I am not touching it.

ohh dang, i don't even know I need to calibrate this thing. I will do that tonight
Thanks man

 

[Miller535]

ohh dang, i don't even know I need to calibrate this thing. I will do that tonight
Thanks man

Yep, it's actually in the installation instructions.

 

[Sdot]

Yep, it's actually in the installation instructions.

Very very easy to calibrate.

 

[Miller535]

Very very easy to calibrate.

It is. Assuming that you didn't lose the graduated cylinder that came with it, or have another one on hand.

 

[SuncrestReef]

On my DOS for auto water changes which pumps 2 gallons every day, I replace the heads annually. For my DOS that only pumps ~100 ml of 2-part per day, I anticipate swapping heads at the 3 year mark, but I calibrate them every 6 months just to confirm things are running accurately.

 

[AJsReef]

I haven’t found an official timeline. However, silicone (tubing inside the head) does inevitably dry out over time. I make an effort to lubricate every few weeks to avoid major failure. Obviously, if your dosing high volumes they will degrade faster

 

[User1]

On my DOS for auto water changes which pumps 2 gallons every day, I replace the heads annually. For my DOS that only pumps ~100 ml of 2-part per day, I anticipate swapping heads at the 3 year mark, but I calibrate them every 6 months just to confirm things are running accurately.

This is spot on.

Replacement is dependent on what you are doing as noted above. AWC != dosing 2 part (for example). One puts more wear and tear which is why replacement is recommended sooner than later.

 

[ca1ore]

Depends what you mean by replacing the heads. Different parts wear differently. The peri tubing will be the first thing to go, but you can just replace it without buying an entire head replacement if you’re even moderately handy. I replace mine annually. Second thing to go would be the roller mechanism. This can be replaced separately. My DOS (used for AWS) has been running for about 18 months and there’s no sign that the roller heads have worn out yet, though I have replacements in hand. Hard to see why the head shell would ever need replacing.

 

[jonmos75]

Recommended every 700hrs of run time, I replace mine yearly.

It is shown on the DOS headcap web-store page.

 

[Tastee]

Depends what you mean by replacing the heads. Different parts wear differently. The peri tubing will be the first thing to go, but you can just replace it without buying an entire head replacement if you’re even moderately handy. I replace mine annually. Second thing to go would be the roller mechanism. This can be replaced separately. My DOS (used for AWS) has been running for about 18 months and there’s no sign that the roller heads have worn out yet, though I have replacements in hand. Hard to see why the head shell would ever need replacing.

I haven’t had to replace anything in mine yet (2 years old) but this is what I plan to do. I dose 3 part so I keep an eye on the dosing reservoir to ensure they (2x DOS) are dosing the same amount of each part by eye weekly. I have a todo in my list to run a proper recalibration check, just haven’t got around to it yet.

 

[Miller535]

O.k. So neptune officially says 5000 hours on the stepper motor (head). And here is where they say it.

https://www.neptunesystems.com/dos/

 

[Miller535]

what we were calling the head, they call a stepper motor

 

[Miller535]

Here is where they list lifespan of said stepper motor (head). 5,000 hours

 

[ca1ore]

what we were calling the head, they call a stepper motor

When I use the term dosing head it's the orange assembly that pops off the pump body. I wonder if the stepper motors are user replaceable? Since the DOS is mostly an OEM item, I'd imagine they probably are. I know with my GHL Doser 2 they are and I have a couple of spares on hand.

 

[Miller535]

When I use the term dosing head it's the orange assembly that pops off the pump body. I wonder if the stepper motors are user replaceable? Since the DOS is mostly an OEM item, I'd imagine they probably are. I know with my GHL Doser 2 they are and I have a couple of spares on hand.

Yes, that orange part that pops off the body is the stepper motor.

 

[ca1ore]

Yes, that orange part that pops off the body is the stepper motor.

No, it's not. The stepper motor is the actual drive unit that sits inside the pump body. In the picture you linked a couple of posts back, it's the square grey part that is behind the orange head.

 

[Miller535]

No, it's not. The stepper motor is the actual drive unit that sits inside the pump body. In the picture you linked a couple of posts back, it's the square grey part that is behind the orange head.

You are right. So maybe the head is 700 hours and the stepper is 5000. I would think you could change them still. I wouldn't assume it very hard.

 

[Miller535]

I contacted Neptune customer support and asked if replacement stepper motors can be purchased, and if the user can replace it themselves. I will update when I get a response.